@kurulumu-Net hmm. That certainly would indicate that 16.x is supported. I was told by @baris some time ago that this wasn't in fact supported, but that could have changed since our last discussion - or, the documentation is incorrect.
A delay is definitely not going to happen, that sounds infuriating for anyone who actually wants the emoji to show up.
My solution will be to make it so the emoji completion will not show up until a letter is typed. For instance, : won't trigger it, but :a will. That will make spaces not trigger it either. That'll also help prevent it from showing up while writing code.