Seamless Activity Detection Capable Smartwatch

My Pixel Watch 2 keeps asking me if I'm walking , doing a treadmill, cycling, swimming or running. I'd love a device to do this seamlessly without prompting me or asking me any questions and without notifying me. I may go back to Galaxy Watch 5 Pro as Pixel Watch 2 didn't beat it in any capacity.

I have an iPhone 12 and Pixel 8 so I can get an Apple device if necessary. Can you please help me with your smartwatch real life experiences with automatic and seamless accurate activity detection?