Spells such as Moonbeam specifically affect creatures with the "Shapechanger" tag, such as lycanthropes. As per this previous question, the ability to change one's shape through class features is not sufficient to be considered a shapechanger.
However, upon reaching the 10th level, transmutation specialist wizards literally receive the "Shapechanger" class feature, granting them the ability the polymorph themselves with greater ease. This feature's description is obviously adapted for player characters, but is otherwise similar to the "shapechanger" feature found in the stat blocks of creatures with the shapechanger tag.
In this context, would possessing the "Shapechanger" feature through the wizard class mark you as a "shapechanger" for the purpose of spells such as Moonbeam?