I feel the same. It would be much easier if we had http direct browsing capability!
But you may get all information as coderus said but it feels a bit tedious (manually searching).
https://releases.jolla.com/releases/4.0.1.48/jolla/armv7hl/repodata/repomd.xml
https://releases.jolla.com/releases/4.0.1.48/jolla/armv7hl/repodata/primary.xml.gz
Here another link with some background info…