It depends, though, on the Ops actual situation, doesn't it, someoftheabove?
She hasn't told us.
It may be that her teen's distancing is part of the natural growing up process, but it may also be because something has gone wrong in that particular family: we don't know that.
Not all teen behaviour is normal and healthy just because some is. Sometimes trauma, depression, a big falling out or perceived betrayal, illness etc can mean that family members get into an unhealthy relationship.
I have never heard the term before, but after we had spent several years on supporting a sick and highly anxious teen, it became obvious (both to us and to CAHMS) that we needed to put in an extra effort, beyond the ordinary "just be there for them", to make sure that her brother didn't completely drop off the family edge.
This involved planning (with some difficulty) to take him out specially, to do things specially with him, rather than just hang around and wait for him to suggest things. He needed that because he was slipping into low level depression and getting used to the idea of always getting less attention.
Not all problems can be sorted by just being a healthy normal family.