I think the first step of appropriacy is a) everyone without exception is safeguarding trained and assessed to be competent to be working in this capacity - remembering a member of the Green party where an inquiry described their not having the capacity to understand safeguarding after repeated attempts to help them.
and b) is in a situation where it is not possible for adults to be confused on their role or whether what they are doing is appropriate, and where it is absolutely certain that what is happening is solely for the benefit of children and not for the benefit, self expression or affirmation of the adult.
This does mean in fact that anyone working in this capacity should be working in a professional, qualified, supervised role with ongoing assessment of competency and performance. Which restricts it and means it should not be something that a social club for girls gets involved in. Safeguarding now needs to mean: no one outside of these set professional, qualified, supervised roles may involve themselves in these conversations with children.
There are now too many very confused adults without a grip on basic social appropriacy and with way too much committment to arguing safeguarding boundaries out of the way. Anyone doing this must automatically be regarded with due caution as to their motives. This is a situation in which the benefit of the doubt is not appropriate. Being kind to adults is absolutely irrelevant.
It's very scary that GG ever permitted themselves to become confused on this. I'm afraid they are probably now fatally compromised, and it's down to poor safeguarding and absolutely shocking basic competency, standards and personal boundaries on the part of those leading this mess.