An interesting aside:

https://arxiv.org/abs/1806.00046

Taurus may be one of the oldest constellations, being depicted in the paleolithic cave art found in the cave of Lascaux in France where it has been radiocarbon dated at 17,000 years old. During the age of Leo the sphinx would have been pointing at Regulus.the star Regulus, which traditionally denotes the heart of Leo, sits very close to the ecliptic as if marking a key date along this Cosmic Age chronometer. As an ecliptic marker, Regulus stands out from the other Royal Stars in that it lies closest of all to the ecliptic. It lies 0.7 degrees above the ecliptic, whereas the other three Royal Stars lie between 2 and 4.5 degrees below the ecliptic
By contrast the Pyramids are held to have been constructed during the age of Taurus.

Approximate dates All courtesy of Wiki!
The Age of Leo Common interpretation: c. 10,500 BC to 8000 BC
The Age of Cancer 8600 BC and ended c. 6450 BC
The Age of Gemini 6450 BC and ended c. 4300 BC
The Age of Taurus 4300 BC and ended c. 2150 BC
Bull worshiping cults began to form in Assyria, Egypt, and Crete during this mythological age. Bull worshiping cults began to form in Assyria, Egypt, and Crete during this mythological age.
   Worship of Apis, the bull-deity , the most important of all the sacred animals in Egypt, said to be instituted during the Second Dynasty of the Early Dynastic Period of Egypt and worshipped in the Memphis region until the New Kingdom (16th century BC).
    When Moses was said to have descended from the mountain with the ten commandments (c. 17th – 13th century BC, the end of the Age of Taurus), some of his people or followers were found by him to be worshipping a golden bull calf. He instructed these worshippers to be killed. This represents Moses "killing" the bull and ending the Age of Taurus, and ushering in the Age of Aries, which he represents.

The Age of Aries 2150 BC and ended 1 AD
The Age of Aries ushered in efforts to replace polytheism with monotheism. The earliest known attempt was by the Egyptian Pharaoh Akhenaten, who, in about 1350 BC, decreed the Sun God Aten to be the supreme deity, apparently in reaction to his earlier lack of inclusion in religious rites by his family. After his death, however, power reverted to the original polytheistic priests, who re-established the old religion. Speculation (including that of Freud) has it that later, during the reign of Ramesses II, Moses was influenced by rumour of Akhenaten's revolutionary idea, and grasped the idea of a single supreme God, who especially favoured his people, as an inspirational mechanism that best suited his people held in bondage. The symbol of Aries can be seen as representing the power of multiple gods streaming down into a single god-head.

Moses (born c. 16th–13th century BC; 7 Adar 2368 – 7 Adar 2488 in the Hebrew calendar), an early Biblical Hebrew religious leader, lawgiver, prophet, and military leader, condemns his own people upon finding them worshiping a 'golden calf' (a symbol of the previous Age of Taurus and of the worship of the bull deity) after coming down Mount Sinai. These events may have occurred during the Age of Aries

The Age of Pisces AD 1 and ends c. AD 2150.
Christianity uses a lot of Piscean symbolism.

Make of it what you will.
Dating of rocks does not help with construction dates. Where mortar is used included charcoal can provide a date for the mortar. Establishing dates by obtaining data from supposed associated settlements makes leaps of faith, not science.
Using subaerial weathering patterns and blaming it on rain when the sphinx has spent vast periods largely buried is stretching the credulity envelope. It makes a nice soundbite but reliability is away with the faeries.
So the Sphinx presents a bit of a problem. Why construct a Lion in the age of Taurus?

It also needs pointing out that conventional archeology does not accept precession was known back in extreme days of yore. (This would not be the first time they have been wrong.

Also some claim pillar 43 of Enclosure D Gobelki Tepi(to date the oldest circle realized at the site), otherwise known as the ‘Vulture Stone’, suggests that iconography at the site was used to record dates connected to precession, the movement of the seasons or astronomical phenomena.
A relief decorating the Vulture Stone portrays a central orb, or ball, poised on the vulture’s wing which appears to depict the sun. (fig.4) Below the jubilant looking vulture is the figure of a scorpion, below which is a headless ithyphallic man to which the orb above may have belonged as a head. Using StarryNight software, it can be determined that at Göbekli Tepe from 10,000-9500 B.C. the summer solstice sun occupied the region of Scorpius. If the Vulture Stone depicts this region of space, there is an ethnographic example of a zodiac which reflects its features to considerable extent.

This is all cut and paste for those that have not figured it out already but plagiarised fromabout 10 sources.