May I suggest taking a look at 2 of my Mods I ported to Fabric recently.

Table Top Craft Adds playable board games to Minecraft, they can be played in the world just like it should be, no decoration block that opens a game GUI. It also has lots of customization options
Link: https://www.curseforge.com/minecraft/mc-mods/table-top-craft

Online Detector This Mod can be handy to automate processes that should happen when a certain player or the owner of the blocks leaves or joins a server. For example this could be used to enable a door closing red stone system when you leave a server.
Link: https://www.curseforge.com/minecraft/mc-mods/online-detector

~ A little preview of the collectable figure customization:

~ And here are the Chess Boards: