[throwaway9d0291]

Development kits like the Pi Zero are usually intended solely for development and experimentation. When it comes to production, you either take the product the dev kit is wrapped around or there's some kind of module you can use.

For example Raspberry Pi has the Compute Module, ESP32 comes as a solderable module and for the Teensy I suspect you'd just put a IMXRT1062 in your design.