depending on what you see as "relatively modern", you can check out "project sandcastle" which lets you run postmarketOS (and thus linux) on the iPhone. Kinda tethered but it runs
Try right clicking on the .app file/folder and click on "Open" in the context menu, this normally skips the trip to the preferences and offers you the "Open anyway" option
All this stuff is constantly moving, but I bet things in the future will be RT Linux plus some RTOS-drive microcontrollers for specific hardware and safety stuff. That's where everyone is heading to.
I just tried it with a local newspaper, it did remove the floating pane but didn't unblur and the text is also scrambled (used to be way worse protected, firefox reader mode could easily bypass it)
Oh yeah, used this method to bypass a regional paywalled news site until they fixed it by sending out scrambled text that seems random enough to not be a cipher ("Zc xjixc Axiäclxiqcil jcqlxi ljx Zxcxqjxiqxi cc")
Yeah, colleagues have happened once, then never again.
I use a Laptop with a Dockingstation for work and take the Laptop home with me every time I leave so I would have noticed if this would have happened.
When home, I always have to lock or my cat would typeeeeeeeeawww