Was the state 2 when you first opened the app while it was charging? If so, open a ticket. It shouldn’t do that or take very long to go green. Should be state 4 already.
FYI RTK is NTRIP. Yarbo is already using this technology. They will be releasing the ability sometime soon to use public NTRIP which will let you use a public reference station instead of your local one. In other words someone else’s data center. You still need your data center for HaLow, or you need strong WiFi or cellular to get internet access to the rover to get there.