There's this apps doc. From there I see in addition to others' comments:
Both being Go based apps. but the neonmodem looks more interesting to me.
Another option is a hybrid one, to add the rss feeds from the lemmy communities your're interested in, or the rss feed from all of them together into your feed reader (even better if newsraft), but those feeds don't show full lemmy conversations and one has to show them in the browser, and also if in need to comment or post one still need to use the browser.
apps doc is constantly evolving, so it's good to keep an eye on it periodically, :)