I noticed this [https://github.com/PSAppDeployToolkit/PSAppDeployToolkit/issues/475](issue / feature request) and thought that PSADT is one of the things that are keeping me from moving to Powershell 7.
I created a fork and started working on making PSADT run under powershell 7:
It works but i have not tried anything but running the default Deploy-Application.ps1. I still need to change the behavior of Deploy-Application.exe and probably some other things.
Please let me know if you have any thoughts!