FromAnotherLibrary-forge-1.20.1-1.0.2.jar
from-another-world-1.2A.1-forge.jar
timecontrol-1.20.1-1.6.0.jar

Perhaps you can make changes to the mod. When you add your mod, the timer of the "Other World" event breaks. When adding your mod, there is only an event notification. How to check?

Add both mods. In Time Control, set day and night to 4 and add night vision to speed up and not miss the event. You will see the message, but you will not find the plate itself. You can set the timer back to 600/600. To search quietly during the day. But on a flat world with 50+ chunks of range, I didn't find it even with a map.

I temporarily removed your mod, the event happened immediately on the first day and with a huge sound. It was right next to the player.

I do not know how a mod should work on a server where there are several players, where there should be a drop.