There is a lot of information about modes and chords that is a bit misleading--hope I don't make things more confusing-

The big point is that in modal music there are no chords--instead there can drones(bagpipes, applalachian dulcimer, banjo, and all those Middle Eastern and Balkan instruments, such as tambura, baglama, saz, traditionally are set up to play modal music, and have one or more drone strings or pipes)--Often consists only of the melody, either played or sung by a single voice or in unison with other voices or instruments--

The chords and chord progressions mentioned above really are a modernization of the music, and bring it into the realm of even tempered, diatonic, major/minor, circle of fifths music--

Middle Eastern and Balkan music, which have traditionally been modal music, have moved into using the Western Chords, even while keeping their traditional scales--

All of this mixing of traditional modal with modern chordal sounds pretty good, but it makes the theoretical explanations(which are always a bit oblique) even more difficult--