is there a way to get data for previous page?? Thanks for clearing my doubt though.

you can check the tutorial here https://rapidapi.com/dodocr7/api/google-reviews-scraper/tutorials/how-to-use-%3F

first page you pass in the next parm false , and you will get the nextpage id in the response and you pass it in the same parm to get that page and if its still have pagination you will get it again , and if you want the first page just pass “false”