For a while Amazon was good at discovering new books to read. Nowadays my ad-blocker blocks everything except for the book I am directly navigating to from the page. No discovery of new books is happening for me there anymore.
Another place to discover new books was Goodreads. Bought and left to rot by Amazon.
I don't buy many books anymore.
You could... change your adblocker? I use uBlock Origin, which doesn't block "customers also bought" widgets at all.