Not sure that's true. Around here (rural Montana) the 5G providers will sell "home" service in town, but not outside town. My assumption is this is because they have enough capacity on 2GHz in town with small cells but not enough on the large 700MHz cells in the country. Starlink is really the only proper provider in our neighborhood. You can use LTE Hotspot but the carrier will throttle traffic pretty quickly.
I worked on a deal with a US state government to bring broadband to unserved and underserved areas by working with local ISPs. Largest proposal of my career so far and will be nice come bonus time if we win but, honestly, if it were me I’d just give the unserved folks out in the country starlink vouchers instead of pouring millions amd millions into ISPs and call it a day.
I probably would have been fired if I said that out loud in front of the client.
The issue is it’s rolling out enough places to start hurting Starlink because speeds are generally higher and it costs 50$ vs 120$ / month.