Yeah, these chinese android TV boxes can have literally anything in them. Some don’t even have the CPU that’s advertised on the box. And trusting the filename of the dtb that it does use isn’t 100% reliable either, unfortunately I don’t know of any secure way of checking aside from disassembling and looking at the CPU yourself.
But with that said, a lot of CPUs use the same/extremely similar driver sets so sometimes a seemingly random dtb for another device will work with it just fine. It’s ok to methodically experiment and go through each dtb to see if it will boot with it.