I am a pretty heavy “Fediverse user” (Mastodon + Lemmy/Kbin) and my feeds have VERY little Linux talk. There is an incredibly diverse set of folks on the ‘verse but admittedly discoverability is hard. If the only people in your circle are Linux nerds then that’s all that might be boosted into your timeline. Put some effort into finding other folks and unfollow some of the Linux-only voices :-).