3. Whether the Abdel Adrian from "A Murder in Baldur's Gate" is even still considered canon is HEAVILY up to debate. Said adventure module was released in 2013. EVERY SINGLE SOURCE MATERIAL since that time - the Minsc comics; "Heroes of Baldur's Gate" module, and "Descent into Avernus" module only ever referred to a "Gorion's Ward" and that a member of Baldur's Gate nobility is rumoured to be a Bhaalspawn. That's literally it.
Descent Into Avernus doesn't mention Gorion's Ward at all, it simply makes references to a bhaalspawn.
It would be odd if an important module(Murder in Baldur's Gate) was magically non-canon, because many elements of Descent into Avernus and related materials rely on it being canon. e.g., Rescuing Ulder Ravengard is a major plotpoint of Descent into Avernus, and Ulder was Abdel's right-hand man as grand duke.
There's nothing to suggest that Abdel
isn't canon, only that he is no longer Gorion's ward.