Oh, 433.92 is only ISM in EU/Africa.
I didn't know that. I'm not too familiar with amateur radio around the world. I know people were able to contact other people around the world, so I assumed the bands were similar.
Most long-distance communications happen in the high frequency bands (3-30 MHz) due to its different propagation characteristics.
I haven’t researched the global commonalities, but I’d wager there’s more consistency in HF than the higher frequencies (VHF, UHF).
What do you mean? This is running on 433MHz, which is within the 70cm amateur band (420-450mhz)