Is it your frontend UI or app? Did you accidentally block something/someone? I was having issues with the Eternity app. It wasn’t showing some posts outside of lemmy.world.
Accessing this community [email protected] from lemmy.world on desktop I’ve had no issues and I’ve been subscribed for months.
Since the website doesn’t include a how-to guide, this blog post helps.
https://blog.system76.com/post/customizing-cosmic-theming-and-applications