Are we likely to see these new Psionic subclasses rolled out onto DnDBeyond anytime soon? That's entirely in the hands of the fine folks at D&DB.
The D&D staff at WotC don't have anything to do with the process of implementing them, sorry.
— Dan Dillon is the Least Turnip 👥 (@Dan_Dillon_1) April 16, 2020
Hi there Clinton! The new Psionics UA content will be available on D&D Beyond next week.
— D&D Beyond (@DnDBeyond) April 16, 2020