I have marked all Flarum versions that the lab can recognize (beta 7 to stable 1.6.1) as vulnerable.
The Lab cannot tell Flarum version 1.6.3 apart from 1.6.2 since all changes are server-side and you need an account to probe for the vulnerability, so 1.6.2 will not show a vulnerable rating. You should still update as soon as possible if you are still running Flarum 1.6.2.
If you are wondering why the list of recent scans disappeared (already a few weeks ago), the SQL query that fetched that information was poorly written and there are now so many entries in the database that the whole website would time out because of it. I still haven't had time to rewrite it properly, so for the time being the list is hidden.