I just assume that any of this cheap unbranded garbage is filled with shit that's toxic. The Chinese companies making this stuff has no reason to care. They can't be held liable for anything.
The same unbranded, zero QA, zero accountability products direct from China being sold on Amazon are also a problem. The only difference with Amazon that puts them like a single rung above Temu and Shien is that they also sell proper branded, non-counterfeit items (though my understanding for a while has been that counterfeits do end up getting mixed in with legit items).
Being a US company doesn’t stop them from being filled with imitation/knock-off goods from fly by night companies.