Accessible systems training

Hi all, I was wondering what people's thoughts are on best practice of making systems training in Articulate Storyline360 accessible, targeting WCAG 2.2 AA. 

Presumably the system being recorded itself needs to be accessible to this standard for users.

How does the built in screen recording show me/try me type content behave with screen readers and key board navigation?

Any experiences from end users that use assistive technologies, that have been through systems training?

Thanks in advance