It would be better if someone who was more actively following and participating in wikidiff2 development was the release manager for it. I don't want to continue to be a blocker (e.g. T202301).
The release process is documented at https://www.mediawiki.org/wiki/Extension:Wikidiff2/Release_process. The only thing we'd have to do is give the person access to upload tarballs to releases.wm.o, which should be straightforward.