I'm reading this but the "non-recommended" part is kinda tricky.
It would be one thing to, let's say, get vaccinated with a non-approved vaccine and claim damage, otherwise, unless, let's say AZ is excluded and maybe simply not "preferred" then it should be ok - as per 1. 1. which ok uses "empfohlen" (recommended/endorsed) so maybe it could be argued but I think it's more in favour of being in the scope rather than not