You can get a watch repair kit on Amazon that will have the tools to remove the pins between the links.
I’ve also had luck going to a department store with a jewelery counter and seeing if they can make adjustments. Especially if it’s a brand of watch they carry, you can always say someone got it as a gift for you from that chain of stores.
I’ve been playing Palia. It’s a chill MMO focused on resource gathering, NPC quests, and crafting.