How much 'widely accepted' lore am I missing out on?

I have all the officially published books but I've not really read up on what can be found in the Pilot.NET discord or what's been posted to twitter. I know that there's early drafts of Wallflower Act 2, Field Guide to Harrison Armory, and Field Guide to the Auric Range on the discord, but is there anything else that's generally considered crucial or widely known that I should look out for?

And at the same time is there any specific 3rd party supplements that are considered 'basically canon' to most players?