Change Safari Safe File Types for Big Sur

I know there is a similar answer here:

Fine-tuning "Open safe files after downloading"

But, the answer seems to not work in Big Sur because I can no longer find the file:

coms.apple.downloadassessment.plist

Can anyone tell me how to add a file type to the safe list for opening immediately after download in Safari for Big Sur?

Specifically, I would like to automatically launch Citrix .ica files immediately after download.

I'm proposing an alternative here, going forward, since the option isn't there anymore, why not use Automator and/or Shortcuts for Mac (starting from Monterey).

You could check the "Downloads" folder for any new .ica files and open them immediately.