Hardware choice and frequencies

I wanted to purchase some freakwan-compatible hardware, but had trouble matching the models listed on the readme to those available. I also couldn't find any info on what frequency is recommended. There's a lot of choice between 433, 868, 915, 923 MHZ, 2.4 and 5 GHz. Lastly, it's not clear to me what the relation is between the LoRa module and the frequencies available. I found SX1276 modules with 923, 915, and 868 MHz, but not 433. Perhaps the list of recommended hardware could be expanded upon a little to include selection criteria?

The closest I found to "LILYGO TTGO T3 v2 1.6 LoRa module" was this: https://fr.aliexpress.com/item/32872078587.html, which is branded as TTGO LoRa32 v1.2 _ 1.6 which I'm guessing is the correct one. But it seems there's also a T3 model which supports 2.4 GHz?