@24Faith-
It is YouTube's app. They wrote and maintain versions adapted to each platform they wish to support, like Roku. Whatever the app does or doesn't do is programmed in by YouTube.
Your Roku will install whatever is the current version YouTube has provided that is compatible with your Roku model.
Roku Community Streaming Expert
I am not a Roku employee, only a user like you. Please, no support questions via private message -- post them publicly to the Community where others may benefit as well.
If this post solves your problem please help others find this answer by clicking "Accept as Solution.".
Ultra 4800 | Streaming Stick 4K+ 3821 | TCL Roku TV 43S245/C107X