I have checked with X2, and it works. I can't check the latest CBB at the moment (Bandlab Assistant refuse to start...).
But in the preset you attach, Bus 1 to Bus 2 control is for the SECOND send from Bus 1 (send number 1, counted from 0). I you sure you have 2 sends on Bus 1 (and testing correct one)?
Note that traditionally Cakewalk (Sonar+) mess with sends where there are some plug-ins with side-chains. Please check on clean project without such plug-ins.
EDIT: I have checked with CbB 2021.4, bus send enable controlling works as expected for me