Issue

Powershell can be installed on Windows or MacOS and a script is used from a custom platform.txt but the pwsh fails to be found even though it can be ran from any cmd windows or terminal

Reproducer

Winows Powershell 7 can be obtained from the store here https://www.microsoft.com/store/productId/9MZ1SNWT0N5D
Then in Platform.txt add:
recipe.hooks.sketch.prebuild.01.pattern=pwsh

Diagnostics

On windows pwsh is installed to C:\Program Files\WindowsApps\Microsoft.PowerShell_7.1.3.0_x64__8wekyb3d8bbwe which is not part of 'path' however there is some sort of symlink (alias?) that is used
MacOs similar occurrence but a symlink exists to /usr/local/microsoft/powershell/7 but Ardunio IDE doens't seem to follow links.

Workaround

Pretty hacky and destined to fail after an update but on Windows adding the C:\Program Files\WindowsApps\Microsoft.PowerShell_7.1.3.0_x64__8wekyb3d8bbwe to PATH environment is a workaround, we tried to repeat it on MacOS but modifying PATH was not as easy.

Conclusion

The Arduino IDE is not following/supporting Symlinks in some manner and/or launching in some 'custom' manner that does not reproduce what a cmd or terminal prompt can launch.