pkgs.org is the largest collection of repositories and packages for Linux and Unix operating systems.
https://pkgs.org/
Using this software in Puppy.
Find the listing of packages for the compatible Linux OS the Puppy version is based on.
They are both using the same core Linux files and programs, that run them both.
Software packaged for that specific Linux OS.
They have a good chance of also working on the Puppy version.
Not 100% will always work, but a lot of them will.
Packages listed under the Debian OS, generally will work in a lot of different Puppy versions.
But it takes looking only in the Debian listings, for a Debian version, that was developed at the same point in time, as the Puppy version.
Good chance they both are using the same core Linux files and programs, that were common at that point in time.
So listed packages are compatible to try and use.
Note:
Only 64bit software is provided now.