What soft wear is not comparable with macOS catalina

If you mean "software" and "compatible" then all 32 bit apps are not compatible. There may be others that are not compatible for other reasons but with respect to 32/64 bit all 32 bit apps are incompatible.

Contact the developers of your apps to determine which are Catalina compatible.

do you mean compatible ?

https://www.zdnet.com/article/here-are-235-apps-that-will-not-run-with-macos-catalina/ I am not sure I only know in audio 32 bit plugins do not work

Apple Menu > About This Mac >System Report >Software >Applications. See the column 64-Bit (Intel). Click that column head to sort by Yes or No.