[verditelabs]

For me, "y'all" has multiple forms

"y'all" - explicitly addressing >1 person

"y'all" - explicitly addressing 1 person while implicitly addressing >1 people. I might say "how y'all doin" to a friend, implying "how are you and your family doing"

"all y'all" - >>1 person or addressing >1 person that was not included in the previous "y'all"

"y'all" - explicitly and implicitly addressing 1 person whom I have not made acquaintance with. If I were working as a server in a restaurant and had a single person come in, I may address them with "y'all". "What can I get y'all?" is the same as "what can I get you?" but the "y'all" gives it some extra politeness or an "emphatic southern accent"