I have GOT to be reading that wrong.
You want to have 20 ticks per second, having it be at or near 20 is a good thing, that's how minecraft operates.
It looks like the server is normally at 10 TPS, and then when one specific person leaves whatever dimension they are in, and goes there, it suddenly starts to work properly.
....
But then the second picture shows that the bedrock dimeion somehow is only running at less then 1 TPS, and that's just... insane bad. How could being there improve the rate from 10 to 20?
Can we get a larger version of that first picture, I've got to see a better context on that, I've got to be reading that wrong.