An interesting alternative to the SQFMI Beepy / Beepberry [0][1] which is just a rpi zero but has a Sharp Memory Pixel display that I love. Both could use some work on adapting the UI to the little blackberry touchpad. Neither using a mouse cursor nor meta/ctrl modifier combos are very ergonomic on these little handhelds.
[1] https://blog.beeper.com/2023/05/16/beeper-x-sqmfi-beepberry/