Reviews and ratings are useless when trying to determine how well a book sold. Some of my biggest sellers have fewer reviews than other books that didn't sell as well. Remember, reviews are often from ARCs so a book can have 100s of reviews but it doesn't mean the book sold many copies. Just like a book with fewer reviews could be a great seller. Some authors don't do ARCs but sell well so they might have less than 50 reviews while another book that didn't sell half as good might have 100s. What people don't realize is READERS RARELY LEAVE REVIEWS. The majority of everyday readers never review books. Most reviews are from authors sending out copies to their review teams, using review sites like Booksprout and Hidden Gems, or professional reviewers. Also, the authors who usually have tons of organic reviews anyway are famous authors. Organic reviews are almost impossible to come by for the average author these days.
It's almost impossible to know how a book did but you can use Amazon rankings as a start. Yes, it's not the best indicator and they tend to manipulate the rankings toward their own books and KU books but still, you can get an idea of how well a book is doing. If a book has a ranking of 100,000 for example they are selling at least a few copies a day. If a book has a ranking of 1,000,000 then it hasn't sold a book in a long time. Also, a book's ranking also depends on how other books are selling in it's category, etc. It's definitely a science to understanding the rankings.
Yes, there are some things you can use. There are websites like Book Report and you can buy PublisherRocket (formerly KDP Rocket). With PublisherRocket you can see the income and sales of your competition. Some of the free sites have closed due to Amazon leaning on them. Amazon wasn't too happy with sites using their sales figures and accessing author's dashboards.
And most of us authors wouldn't touch Goodreads with a 10-foot-pole.