ITR of AY 21-22

I had filed my ITR of AY 21-22 within due date but not e-verifed the same till date and its pending.

can I e-verify now ?

also is there any option to revise the same return now because there are few changes to be made
or is it better to go with ITR -U after e-verifying the original returns.

pls guide on this issue.

Thanks