Simone Dal Maso
the situation for Seika Display Braille is quite strange on my opinion.
Now, for Seika until version5, users should use an external addon, since from 2019.3 NVDA is not able to recognize properly the display braille.
For seika6, the situation is different because there are no addons and NVDA is not able to initialize the display.
I think that NVDA should be able to manage Seika Display Braille... do you have some hints or ideas about this?