the 1pm thing was free with prime until not too long ago. Now you pay. Amazon seem to be turning into Aliexpress/Temu lately, hard to find brand name items at the top of the search list anymore, just the usual chinese junk.
To be honest, I don't like shopping on Amazon anymore for the most part. As you rightly point out, for most things you search for you end up with a seemingly infinite sea of exactly the same chinese product but all called a different name and priced at loads of different prices. It's a pretty hateful experience to be honest.