'Text-to-Speech' is now 'Assistive Reader'

Along with the terminology change, there are the following improvements:

• Text is highlighted as it is read out, similar to Immersion Reading
• Screen sleep is disabled while it is reading
• Reading speed is adjustable from 0.5x to 3.5x in 0.1x increments
• Reading pauses when tapping to highlight text, add notes, view reading options, and resumes where it left off when you tap Play button

Kindle app version is 14.99.100. I do not know which versions of FireOS are compatible with this (I have Fire HD 10 Plus 11th gen and Fire 11 Max).