It's unfortunately not possible to run the Wine-based version of Mp3tag on Catalina. Apple stopped supporting 32-bit apps (and 32-bit instruction codes on the Kernel level) with Catalina and Wine is one of them.
I've started to work on a native version of Mp3tag for macOS and I'm currently working on implementing Mp3tag's scripting language. It's still far from an early beta, but I'm making steps in that direction (almost) every day.