I love my GL-INET products.
I would absolutely LOVE to see a GL-INET Raspberry Pi hat, microsd, & travel router batter/case kit with their OpenWRT implementation.
What you’d get when you buy it is the Pi Hat, Modem, and a case. There could be cases with external antenna connections, bigger batteries.
There could be cat16+ modem varieties, etc.
Assemble the PI, pop it all into the case, insert the microSD, and tada! A maker type LTE travel router.