It is difficult to find that MR5200 does not support 5GSA mode

I bought a MR5200， mobile router in Hong Kong and used it in China. At present, both China and Hong Kong are connected to the 5GSA mode.But MR5200 uses Qualcomm X55. According to the document, it supports NSA and SA mode, but now I have replaced SA mode in all places I use, and now I can’t connect to the 5G network at all. This MR5200 has become a useless thing.Can the technical engineers of NETGEAR upgrade the firmware of MR5200 and unlock to support 5GSA mode? Is there a specific timetable? 5GSA mode is the general trend in the future. The latest 5G routers do not support SA mode, so disappointed，Where is the engineer of NETGEAR, please come out and answer, I need your help here，My model is MR5200-EUR