Seafile i
Seafile is an extension of the premium Plesk. Latest version is 2020 (7.1.3) and out of support. I would suspect that for a paid plugin, this will be updated.. Low demand is not an excuse to just leave it as it is.
I am using Seafile for a wile now, there is a new update available (8.0) for the community edition. This enables new features as filesearch.
When will this be available in Plesk?