How to use a global account with Forerunner 255 purchased in China?

Someone purchased a Forerunner 255 in China and registered an apparent Chinese account. The live track uses https://livetrack.garmin.com.tw/ and Baidu Maps, instead of https://livetrack.garmin.com/. The live track was barely usable when she was in China due to multiple issues. She is in the US now, and the live track has become unusable because the track is way off (1 or 2 km off).

Is it possible for her to register a global account with her Forunner 255? If yes, how should she go about it?

Thanks in advance.