I am not a beneficiary, so pretty sure no way I would get access to that group, but maybe you can post screen shots.
Not sure what was the point for you posting that picture of the profile, since with that alone, it's impossible for us to tell whether that is indeed the group filled with legit beneficiaries or just another group by scammers, as you might have seen, another guy posted a screen shot of the Surtie trust with a 790mil balance recorded on the LSE in this thread yesterday which was filled with so many errors that it only took a minute to prove it was obviously fake... so screen shots with no details in this thread really doesn't mean much.
But with enough details, there is probably someone in this thread that can attest to your legitimacy, as far as I can see, there are 1 or 2 person that seems to have some legit insider info on the case lurking in this thread.