When you take the “root:sus2(sus4)” combo from a major scale, you’ll find that you get Sus2 on 5 out of 7 chords/scale modes - Ionian, Dorian, Lydian, Mixolydian, and Aeolian. Phrygian and Locrian both have b2 so you can’t do Sus2 chords with them. Sus4 would be in Ionian, Dorian, Phrygian...