I always find it interesting to see which gun accessories that Amazon finds acceptable and which they consider evil. While I will pick it up at my LGS, I went to Amazon to look at reviews on AR vertical foregrips.
My search term was "vertical foregrip". It brought a bunch up, but all of them were weirdly named Chinese knockoffs. It appears that Amazon considers vertical foregrips evil, as all the Chinese ones were labeled similarly to: "Ateomnza Outdoor Sports Tool, Providing Great Convenience", obviously to skirt algorithms.
Anyway, I think it's comical as to how Amazon bans or doesn't ban gun stuff. Their "ban" department obviously doesn't have anyone in it who knows anything about guns.
https://www.amazon.com/s?k=vertical+foregrip&i=sporting&ref=nb_sb_noss