Ask HN: Best Bluetooth keyboard for coding on an Android phone

I recently discovered and configured termux on my Pixel 3 XL. I want to use the phone for quickly fixing stuff in vim on the go without a laptop.

Termux allows to add rows of special configurable keys above the main keyboard, but at the expense of the remaining editor space on the screen.

Thus I am looking for a Bluetooth keyboard of the size of a large smartphone with a layout that is friendly for programming.