My understanding is that 5G runs on really high frequencies. These high frequencies don’t have penetrative abilities through buildings, and are very limited in range compared to lower frequency generations, like 3G and some 4G frequencies.
The other problem you may have is that your provider just may not have infrastructure out that far, or even access to other telco towers.
Definitely try to force a 4G connection if the phone will let you.
Start a star trek server. Take the power away from them if that’s what you want