All y'all is the plural ...
“Y’all is the singular ...
All y’all is the plural …”
Not really. No one correct answer. Y’all can be singular, or for small groups. Example; joking with a couple of friends you might say “Y’ll can kiss my a$$”. But larger groups could be All Y’all, but a simple Y’all still works.
But I’m from Texas. There may be other dialects that have different rules. Language is almost as hard as math.
“Y’all is the singular ...
All y’all is the plural ... “
Thanks! Our pastor (a Yankee) uses this term often. “All y’all” is a term that reflects a single desire among a variety of viewpoints.