Why?
We do not know the exact date.
The Pope has no such authority anyway.
One of the few things where I have agreed with him. The Orthodox calendar may be closer to the original calendar, so I think it would probably be conformed to their calendar. However, this wouldn’t affect Latin Rite services, just the date of Easter and all of the things that have to be 40 days back, 50 days after, etc.
This might actually give us a chance to redo the miserable Latin Rite calendar that allowed things like Ascension Thursday on Sunday...
Although the danger is, with this horrible Pope, Thursday would permanently change to Sunday. He has a total tin ear for liturgy, and an anti-tradition agenda.
But I do think the Eastern Church and the Western Church should work out the same day for Easter.