If they wanted a Wolverine in the MCU, they should've casted someone new. Love Hugh Jackman's iteration of the character too much to let Logan's ending go to waste. Even if he's a 'different' Wolverine, him playing that character is still always going to be synonymous with the Fox films (no matter how bad they were).
The only reason they did it is because the MCU has been on a downward spiral since Endgame, and because of how lackluster Phase 4 has been so far.
They're literally digging up the grave of a dead character to bring him into their cinematic universe and justifying his existence through 'multiverse shenanigans' when they can literally reboot the entire character, but that would mean not making as much buck as this would probably do so.