Dog “checks on” everyone when we go on family outings

I have an 18 month old St. Bernard mix who does this whenever we go for walks, hikes etc. outside. It’s not concerning behavior to me at all, I’m just curious if anyone has insight on what she’s doing or why.

When my fiancé and two preteen kids and I go out on adventures and bring my dog places she can be off leash, she does her own thing for a while , sprinting around or sniffing stuff or whatever — but then she periodically seems to make rounds on us all. If we’re scattered out, she will go from one person to another and “check in.” It’s adorable , and it’s like she wants to make sure that everyone is present and accounted for and that everyone is doing ok. Is that what she’s doing? I’ve never had a dog that does this before lol.