5G Flex Module?

Is there a time frame for a 5G Flex Module that would be compatible with T-Mobile in the US & work in a Balance 20X? My Balance 20X currently uses it’s cellular as a secondary WAN, but T-Mobile in my area stopped supporting 3G recently, and the SIM card I am using has unlimited 5G data but a monthly limit of 4G data (and zero 3G data since there are no towers within range that run 3G anymore).

i’d like to know this too!