There is no current version of the mcu x-men which means it's fresh either way.
The same way new franchises such as Eternals and Shang-Chi were.

This isn't the comics.
What reason is there to "soft reboot"? what exactly is going to be involved in a "soft reboot"?
Is it the original characters being recast? because they already have a NEW Captain America, Black Widow, Hulk, Hawkeye, Black Panther and Iron Man etc. They already have a new Nick Fury and Shield.
So what happens? all of that and the previous continuity is erased?