I mean, there has been investigations, many investigations, and they've found this sorta thing is Amazon's MO.
Example:
https://arstechnica.com/tech-policy/2019/08/report-finds-mor...
>Among the Journal's findings: 116 products falsely listed as FDA-approved, including toys, which the agency does not regulate; 80 listings for infant "sleeping wedges" the FDA says can cause suffocation and that Amazon had previously banned; 1,412 electronics listings falsely claiming to be UL-certified; 2,324 toys that failed to include federally mandated choking hazard warnings; and more.
>The WSJ commissioned tests of 10 specific children's products it bought on Amazon, many carrying the enigmatic "Amazon's Choice" badge. Of those, four failed tests based on federal safety standards, including one that contained excessively high levels of lead.
>A 23-year-old man in Missouri purchased a motorcycle helmet from Amazon that was at the time listed as certified as meeting US Department of Transportation safety standards. Later that year, however, he was killed in a crash while riding. A federal investigation later found that the helmet did not meet DOT standards and was recalled. The WSJ, however, found the product still for sale, with an active listing promising compliance, until the WSJ contacted Amazon to inquire about it.
>The WSJ's investigation found 157 products for sale that Amazon has already banned from sale on its site. The motorcycle helmet was one of more than 2,300 product listings altered or pulled after the WSJ drew them to Amazon's attention. Yet, within two weeks, the WSJ found that at least 130 of these problem items reappeared, "some sold by the same vendors previously identified by the Journal under different listings."