It's not really a fuel filter. Or technically it is, but it's really a suppressor kit sold as a fuel filter. You may also hear them called or sold as "solvent traps". This is largely because a suppressor is largely a safety and convenience device, but acquiring one legally is a painful, multi-month process with a $200 tax. You can make one legally by filing a form 1, but it is generally understood that the wish.com "solvent traps" or "fuel filters" will not necessarily be used legally.
And I'm with you - I probably wouldn't want to put a wish.com-sourced fuel filter on a firearm any more than I'd want to put it on any machinery.
lol, I have a stake in a small brick and mortar store and I recently had a plumber in looking up an electric water heater on wish.com and say "i could order you this and fit it when it arrives next month" - I honestly thought he was going to come back and tell me I had been on a candid camera show - don't know whether it's terrifying or hilarious. It cemented in my head the idea that anyone who orders something from wish.com is a halfwit
And I'm with you - I probably wouldn't want to put a wish.com-sourced fuel filter on a firearm any more than I'd want to put it on any machinery.