This is just for those superhet 433Mhz Receivers.
I tested one yesterday with a 3.3V VCC and I did not see it go over 3.3V.
I don’t have it in the image above but I put a 3.3v to the lead initially this signal never exceeded it.
So I can say with confidence that the 433Mhz Superhet will not burn out the pin due to over voltage.