For accessibility testing, it would be great, if you could hire users who are familiar with using assistive technology such as screen readers or use the keyboard to navigate through a webpage.

Hi, you can recuirte participants who use assistive technology via the participants pool Useberry offers (Prolific).
Create a new Prolific Target audiance, then select the attribute “Assistive Technology” from the list of attributs. A list of assistive tech options will appear for you to select from (see attached image for the offered assitive technology options).
