My current META for this is just saying “Do you know about <thing>?” wait for their response and if they know we’re done! If they say “No” I then ask “Do ya wanna hear about it? Approx listening time <x> minutes!” and respect their answer.

It’s about etiquette and giving them a choice. You have to be prepared for them to say “no” to hearing about that thing you’d like to info dump about. It’s not that dissimilar to getting consent if you think about it, it’s rude to just start shoving your information into their brainhole, so to speak lol