TextEdit on Big Sur does not use TextKit 2 for "Wrap to Page." As noted above by the Frameworks Engineer, the functionality is not available in TextKit 2.

Is there any additional information on this? Monterey is now RC and FB9285387 is still open with no similar reports. The lack of this feature would cripple my app, which has been on Mac since 2007. I think many developers would appreciate guidance here, even if it's just a commitment on how long Apple will maintain TextKit 1.