GOldAPPle78 wrote: "Is it safe to use unofficial ways?"
I don't know about other "unofficial ways", but this particular one appears to be safe. ...But as the source article says: "Apple may kill this functionality again in the future; hopefully, they won’t."
"I just tried your method and there’s an error msg"
As tt2 pointed out, fix your typo in: "prefs:root=WIFI" and it'll work.
"I think I will wait for iPadOS update to fix Shortcuts instability issue."
Considering the wide functionality in Shortcuts, there are very few stability issues – so I encourage you to keep experimenting and learning. I don't know whether you have a Mac, but when this thread is viewed on one, your iPad screenshots appear overly large. It's not your fault, it's just the way these Communities currently work. ...But if you want a small Shortcuts learning project, try creating a custom shortcut which downsizes the width of a screenshot to, say, 500 pixels and saves it to Photos' "Recents" for subsequent use in an ASC post. (I'm working on a shortcut for use with ASC, and one of its Menu choices will be such a "downsize screenshot" option.)
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