Flarum is currently in beta.
However, I want to write some important SEO problem I have seen.
1 - There are too many dofollow links on the site. ("Mentions, Likes, Replies") - Their attributes must be "rel = nofollow".
This item is very, very important. The reason for this: When Google bots enter the page, they see too many dofollow links and try to index them.
This slows down the performance of the bot and cannot navigate the site in great detail. I would be very happy if you bring this feature before Beta 14 is released. Fixing all plugins one by one with node.js is very tiring.
2 - the ?near tag.
Google indexes both the near tag and the normal page. Therefore, because the two urls are trying to index in the same way, the bot is slow and cannot navigate the site in detail.
I ask you, edit at least item 1 before beta 14 comes out.
I love Flarum. However, doing the above on SEO will take us much further.