Also same thing here: Taaroa iUP, surf/sup foil with GBS, IA driven - Info for the DiYer
In principle there is no big problem to make an electronic e-foil. You need control system and mechanics. So this thing definitely works, but might not be working so good with ride on top.
I‘m currently constructing Proof-of-Concept of similar thing and have created topic here: Hydrofoil with active height control