The patch is pretty straightforward:
https://github.com/openzfs/zfs/pull/17717/files
Looks like 2.2.x is still supported. It just had a release in August. No MFHs to any branches yet, except in a developer's fork:
https://github.com/behlendorf/zfs/commit/3dc345851cd16af444acee120202152563660e34