While Flarum uses some Laravel components, it's usually not possible to use "drop-in" Laravel packages into Flarum.
Looking at the documentation page, even if you can get the backend to work, the frontend is written in completely different frameworks from Flarum. Again, not a complete dealbreaker, but that would probably take a significant amount of work, as it would need to be either isolated or re-written.
From my experience, it's usually easier to integrate services/packages that are framework-agnostic rather than one "made for Laravel".
For reference, the only Laravel package I can think of that has been integrated with Flarum is Laravel Scout. It's only a server-side integration, and even that required some tricky workarounds to make the package think it was running in a Laravel environment.
