In reply to bouldery bits:
Personally I have a normal phone (OnePlus 7t) but put it in a UAG case - caveat that this particular phone isn't waterproof, but my wife's Pixel 6 is - and also uses a UAG case, and recently bounced 3-time on a hard stone floor before falling into a (very cold!) swimming pool and sinking to 1.4m.
When this hero retrieved it from said freezing pool, it worked perfectly fine - a message came up saying it detected water in the usb port, but this cleared after 10 minutes.
Both our phones are regularly dropped and chewed by a baby and older children - so pretty tough, without sacrificing the actual phone.
[Edit: Just seen your last sentence about not wanting a phone+case combo, sorry!]
Post edited at 09:45