Check out polychords and 4 notes extensions as subs
ex. Em7 as a sub (and any way you can play them) for CMaj7
Em7=egbd which is 3rd 5th 7th and 9th of the CMaj7 chord
Lots of info on this subject to check out and easily applied. Unlike when I had to learn it 50 years ago
I went from cover to cover in the early 70's of Ted Greene's Chord Chemistry book. Great book but kinda hard to sort out