Native flowers attract bees and offer pollen + nectar for them :)
Don’t forget that honeybees aren’t the only bees nor the only pollinators. Ask your local university or beekeepers / native plants association about what you can do to help out in your area!
Lemmy actually has this feature already. Accounts can mark themselves as a bot and also whether they see bot accounts. Because of that, I can’t imagine it would be a lot of work to implement on kbin.