I don’t know if others are experiencing a similar situation. My all feed is very sparse with engagement. If I sort top six hours or by top 12 most posts have between 5-10 comments. I feel like there was more in the past? Is engagement dropping off? I’m on lemmy.world as my instance.
I’ve noticed that some instances, including lemmy.world, are getting more aggressive with blocking other instances (also due to assumed “spam”). At the same time, the /all/ feed is only populated by the communities that other users of your instance are subscribing to. I’d look in some newcommunities communities to subscribe to more interesting communities so that they pop up in your /all/ feed. Another reason is probably also that many people are moving away from lemmy.world to smaller instances.