Go to Write tab. Click on ## ( on the right) to access key signatures.
Click on Tonality System and Choose Equal Temperament ( 23-EDO)
All the accidentals are at the bottom of the right panel.
But as Daniels says, none of them are working.
I suppose since they are included in the shipped software, they are priorities for the developers. I am excited to see this working!
Chekad