Hello all,
Wine now supports dotnet7, but wineskin is not up to date with wine. If you want to use the latest pkhex with wine, I recommend installing wine with brew. https://brew.sh/
After installing brew, install wine with
brew install wine-stable
After installing wine, you can run pkhex by running
wine /path/to/pkhex.exe
If it gives you the "no dotnet 7 runtime found", then download it from here (https://dotnet.microsoft.com/en-us/download/dotnet/7.0) and install it using wine the same way you ran pkhex above. After it installs, run pkhex again, and you should be good to go!