According to ports r560011 replaces graphics/qt-avif-image-plugin.
Created attachment 221584 [details] v1
Moin moin lgtm mfg Tobias
A commit references this bug: Author: jbeich Date: Mon Jan 18 21:03:50 UTC 2021 New revision: 561968 URL: https://svnweb.freebsd.org/changeset/ports/561968 Log: graphics/kf5-kimageformats: expose *.avif support after r561913 PR: 252698 Approved by: tcberner Changes: head/graphics/kf5-kimageformats/Makefile head/graphics/kf5-kimageformats/pkg-plist