For those who are interested, I have setup a 32bit PPCPorts binary repository for 10.5.8. Mainly useful for G4 users and also G5 users that can't or don't want to use PPC64.
Currently approximately 1000 packages are available: https://kemonomimi.nl/ppcports/
P. S. On a more general note, it may be worth checking what is committed in the main GH repo and building what is of interest. By now there is a lot of stuff which never existed in MacPorts at all, and we don’t have any news channel for new ports LOL