How To Remove Ghosts using hub tools or a UZB Stick

Two questions:

I have a number of devices that show no route but appear to be ok. Example:

The definition of ghost above is one that has no route. However this device and the others like it appear to be fine. So just confirming that there is nothing wrong with not having a route in this case?

Second question, can you remove an S2 authenticated ghost with Hubitat built-in tools? I have tried remove on one node several times and all I get is Pending. I am not sure how long I should wait before I move over to getting out the Silabs tools?