Question about Huawei Watch GT 3 Pro

Yes, both are possible. There is a very large selection of different watch displays in the Huawei Health app, including free ones. The wristband is interchangeable, different wristbands are also available from third-party providers. Simply note the width of the strap.

Yes, can buy different screen settings or free...
you can change bracelets are difficult to find. my watch is super.....

No idea