First, thank you for putting the community name first, before the poster's name. I'm not sure why all of Lemmy has it the other way around. I usually couldn't care less who the poster is, it's the community name that's important.
Here's my two suggestions:
• When viewing a single community and the name is at the top of the screen, there's no need to repeat the "in [community name]" under every post. Omit that and just display the "by [user name]"
• Abbreviate the time display. Instead of "3 hours ago," display "3h". Both Apollo and the lemmy web interface do it that way and it's much cleaner.