I'm not sure this is the right community.
I've been hoping for a TUI frontend for Lemmy for a while, but unfortunately none came out and I've decided to build a proof of concept on my own.
It's written in python with pythorhead, blessed and chafa.py and it's quite janky.
There's TIV/FIM/imgfb if you're looking for ways to render images in terminal. Or convert them to sixel.