Not atm. My PPC machines are stored away and unfortunately I lack the time. I don't recall which version it was I tried. As mentioned, it compiled, but programs (including Qt Creator) froze upon startup.Do you have a repo to try it out?
AFAIK, later Qt5 will be close-to-impossible to fix due to reliance on newer SDK features, but earlier ones should be doable.
IIRC I tried the latest version said to support Leopard (Tiger? 🤔) but ran into mentioned issue.
Wasn't particularly important to me, so I gave up.