Nope, though I communicated a lot with the Ukrainian hacker who started the project and the whole bananahackers community.
My primary phone is from 00s, running a proprietary ENEA OSE operating system, and I have no reason to change it. Though if I'll have to, I'll consider something KaiOS-based or Android-based with a keypad, like Nokia 800 Tough, Discovery A17 or Snopow M2. Ideally with a GNU/Linux port available, bananahackers are digging into this direction too.