Opinions on POVs

Hello! So my book is in third person and flips between two of the main characters (it is very easy to tell who’s pov it’s in)
I wanted to know how you guys felt about maybe one or two of the middle to late chapters being in one of the already established supporting characters pov.
Mostly it was to show how one of the main characters changed from a different perspective other than their own.
What do you guys think?