16A is still enough current to cause issues, but there is a somewhat less risk. Because it's all going through the exact same size pins, owing to the standard and need for interoperability, there's some additional safety factor at 16A. It really is too bad there are so few 16A options since it's such a common opportunity to have a 20 or 30A outlet and 16A charging is more than enough 98% of the time.

I have been using a 16A Duosida unit with a UL-listed cable assembly (not the whole unit) successfully for years. It's pretty much a crapshoot what you'll get when you order EVSEs on Amazon or eBay, but I got the unit pictured on the Duosida website as their 16A unit. Oddly, if you click on it it takes you to an Amazon listing for a different unit. Maybe it has the same guts, who knows? But you can still find listings for the one I got. Entertainingly, one of them is POTATO brand. That unit looks identical to the one I had success with other than the plug, I got mine with NEMA 6-20 inlet. You can change the inlet plug if you are handy. Or search for the same-looking charger with 10-30. Pay attention that the J plug looks the same. YMMV.