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Yes it'sYou may save battery by disabling 120hz refresh rate

https://gadgetzninja.com/newBlogPost-J_LL4dI_4bihf2dF1UimKJust install it on phone then connect with watch ... you are good to go

I faced the same problem in Oman (Error message: This Service not available in your ....)But I got it working by downloading a modded Health Monitor app from a YouTube linkInstalled it on mobile and just worked fine

S21 U and N 10+ looks same