No, in one of Jonhster Spaces Posts stands that the latest version of Beta is 3.
Viewing post in Baldi's Fun New School Ultimate comments
Let me clarify this. Beta 3 will not be the final version before 1.0 of BFNSU is released (some more Beta and pre-1.0 versions are planned afterwards, but they won't come out until sometime after the FNABR V1.1 update has been released), and Beta 1 is currently under development and has not been released yet.
Hopefully this updated version of my previously published release plans image makes this clear for anyone wondering about it.