I am using Time Sync [Forge] and every vending machine in the world will never change the inventory when a new day starts.

1.16.5-forge-36.0.1
timeSync-1.0 (https://www.curseforge.com/minecraft/mc-mods/time-sync-forge)
VendingMachine-1.16.2-1.0.0.3

Is there some way to make a command or have it refresh based on world ticks?

It's a bit annoying to have very op items available every day from the same machine. And after awhile they are just too cheap...

Not sure what they are doing (would have to investigate), but I'm assuming they aren't advancing time past one day (i.e. going back to zero), which will prevent restocking items.