Hi there! First of all - great job, thanks!

Is it possible to use Clipboard in your mod?
Found class net.minecraft.client.util.Clipboard; how to implement in into
https://github.com/CinemaMod/mcef-fabric-example-mod ?
Is it difficult to use clipboard?

We can use
minecraft.keyboard.setClipboard("any");
minecraft.keyboard.getClipboard();