To be honest, I never tried a healing sub on shrooms, I mean I only did shrooms once and I listened to a subliminal to become charming for I believe 8-10 hours straight (time flies really fast on shrooms). It worth a try tho!
As for the no change part of your post, in my opinion, it might have been because of how you used it, see shrooms can be used in a bad way/non-beneficial or good way/beneficial. I will give you an example of both:
Bad Way: You used it for “fun” with friends or alone which a goal in mind for why you used it.
Good Way: You have a goal in mind that you hope shrooms will help you with and you listened to a subliminal that you believe will help you accomplish this goal then shrooms will make that happen like a connection in your brain.
Now I’m not a scientist nor a pro subliminal researcher (if that’s a thing) however I have used subliminal ever since I was 14 so this comes from an experience standpoint and not a scientific standpoint.