The reason it's harder to do that on the internet is there's no kitchen to help out in. 
To elaborate: A good coping tactic when it comes to IRL parties and events, if you're autistic, is to be "helpful". "Oh, do you need any help? Shall I help you carry these plates out?" That sort of thing. This allows you to not be standing around at the edges of the party looking miserable (and unfortunately people read "totally neutral expression" as "miserable/angry", which will cause people to get on your case like "are you not enjoying yourself!?" "shouldn't you be having fun!?" as though I really want to be in this painfully overstimulating environment, making small talk, which I hate) and will instead give you a task to do that will make you a positive contributor to the party or event without needing to be near the loud music or make small talk with people. "Sorry! No time for small talk, I need to help put out all these snacks!"
Generally, at IRL parties, autistic people who don't want to just lurk will usually find an activity to do. If it's not helping the host, it's making cocktails (and an autistic person who knows about cocktails will love a chance to make all those cocktails), setting up the beer pong (makes you look like a "party person" while avoiding talking to people), arranging a big game of Mario Kart, or a singalong at the piano. Because just standing around making small talk is the worst, but doing things together is okay, even nice!