Help me Reviving my poco M2 pro

I have poco M2 pro 4/64 gb varient, running a15 project pixelage on it. Now I am thinking to gift it to my younger sister. And I want it to run smoothly with no issues, no hanging, no problem at all. Well I got no issues with this rom except there are so many stuff here so I am gonna format anyways. So was thinking to go for same or A11 custom rom or stock or anything else.

I am disconnected with the community for almost a year.

Your help will be great.