Full photos for reference: https://imgur.com/a/sEEZez7 (the post photo is here because Wefwef said I need to attach a photo)
Previously I've lubricated plenty of door hinges by popping out the pin, putting a bit of petroleum jelly, and hammering out back in. This door goes to our garage, tho, and it seems to have different looking hinges.
I'm curious what's the best course of action. Is there a pin that can be easily removed like most interior doors, or do I need to do something different?
I use white lithium grease (spray bottle with thin straw) in the hinges. Maybe you can find a way into the inside with the straw. WD-40 and similar oils are too thin for a hinge long-term.