I don’t think there is such a list.
I think tho that you should simply better check what modem you want to buy (can afford?) and then search on the Internet for the proper linux kernel module that supports it. And then check/ask here if it’s already compiled on Omnia. The same goes for all the hardware I think.
For example wifi modules of original omnia cards are: ath9k and ath10k_pci. Just find the modem first. I am trying to save some money for this: Support/Patch for Sierra Wireless EM7565. This modem supports 5G.