Does the amount and quality of reviews affect your Google Maps ranking?

There is no direct evidence that this impacts ranking. However, there are other factors to be taken into consideration.

There is no evidence that keywords in a review or the owner response specifically help boost rankings. What reviews do is help increase user engagement on the listing. User engagement is a ranking factor, i.e., the more time users spend time reading your reviews and clicking on features within your listing, the higher the chances that the algorithm will present your listing to a new user.