nhiaayenge since it's been a few days and you have not gotten a response, I think we can assume that none of the regular Flarum contributors know.
I suggest either waiting a few weeks for others to give their opinion, tracking the owner of a forum that uses this extension with Adsense and contact the them directly to learn their experience, or try for yourself and see how the extension works and whether it would meet the Adsense requirements. If needed, pay a developer to investigate for you.
Does adsense provide any tool like placeholder ads or visit bots to check the implementation? This would be the simplest solution, just deploy with test mode and get any feedback directly from the ads platform.
