Lemmy is too small and insular. Only mainstream (politics) or echo chamber (Linux) content gets enough momentum.

Reddit was large enough that you could shun the main communities and still find enough content in really niche communities.

People also don’t stick to designated communities and posts overflow to all sorts of places. I block all politics, but want to see memes. But all the meme communities are overflowing with political memes.

It’s a difficult time politically too, and Lemmy (socially liberal) is very much against incumbents (conservative nationalists) in most parts of the world.

My advice would be to expect little relevant content. Use an app that let’s you block things (I like Boost). Block all the communities and keywords you want (Trump, parliament, elections, Ukraine, etc etc). Ultimately cut back on social media use as it will always focus on politics. Go directly to sites that cover content you like.