That was just a proof of concept mostly. I've published the scripts to build rootfs at https://github.com/NotKit/maemo-leste-fxtec-pro1-debos and can explain the setup if someone wants to take it on, but unlikely to continue much myself. The main downside is using libhybris and it makes upstream not that interested in it.

On a bright side, phhusson attempted bringing up mainline kernel on Pro1: https://github.com/phhusson/linux/tree/fxtec-pro1. Currently it only boots to console with USB networking, but with panel driver implemented, it could be possible to boot Maemo Leste with Freedreno.