Not sure why Bluetooth support has still not been added to Termux or their official Termux API apps!

Be advised that the main Search Results for this do NOT work as I tried, waste of time: https://www.samgalope.dev/2024/09/09/how-to-automate-bluetooth-tasks-with-termux/
It seems like he has not tested the solutions he posted / AI auto generated content:
https://www.samgalope.dev/2024/12/02/fixing-the-unable-to-locate-package-bluez-termux-error-a-step-by-step-guide/
Don't bother with these steps as they do not work due to lack of bluetooth support in Termux itself.

The solution provided above now has issues due to updates:

Thus, since the apk in Termux-app-bluetooth is based on the version 0.64 of the Termux project you must install a more recent version of it.

However, ~~after September~~ when I get some free time, I will try to work on a new version of Termux-app-bluetooth that supports update or installation of packages.

Not updated for 5 years as @steven-salazar-molina is busy.