- Camera is usually device-specific, but my Pixel/OnePlus devices have usually been very good at this
- Google released the "Nearby Share" feature a couple weeks ago
- Wi-Fi sharing can be done with standard QR codes, but I don't know if this OS-specific
- Tasker is different from Shortcuts, but a viable option. Very powerful, but more complex too
- I agree with the Duo point. It's a great service, but not well known. Google being Google I guess.
(To be clear, not disagreeing with you, just adding to the conversation)