Still not working.
The only file from updates-testing repo metadata¹ providing "recommends" XML
tags is the 2b1dda391308bf7395f9890774b4d2d0692b615c2ad6a73fa378080d32c0c531-primary.xml
file, but it just has those tags for 6 packages.
¹ /var/cache/dnf/updates-testing-648243a4cddd356c