Responses
I think you're looking at what an omegaverse is wrong, it's just a base where authors can add their own additions to their stories that could catch on or not, and you just have to sometimes use context clues to understand that version of the world. So really, you don't need to catch up on any "lore."

I need to catch up on my omega verse lore, what the heck is physical resonance and what happened between them that I missed? I thought it was a normal accidental encounter? Am I missing something? Still love it nonetheless!