Questions about Huawei Watch GT 3

It works quite well with an iPhone, but I noticed that it disconnects when you go more than 7-8 m far from the phone, or go into next room in my apartment. I used with my Samsung phone as well and it stayed connected everywhere I go in my apartment.

I answer myself! I put the link of the Watch 3 and not the GT3 :-) Watch 3 = esim GT3 = Bluetooth

That probably ended up in the questions by mistake, didn't it? ;-)

Yes, the Mate 50 will also work without any problems.

Yes, it is. According to the manufacturer, at least HarmonyOS 2 must be installed, so the Pro 50 can be used there without any problems.

Yes, the GT3 comes with HarmonyOS.