Recursive function returns: Evaluation resulted in a stack overflow and cannot continue

If I understand your use case, here is one way to do it.  I made this this list and called it ListToCheck

= {1,"text", {1..3}, [A="text"]}

Then used this expression that returned a value of 2 (1 list and 1 record).

= List.Count(List.Select(List.Transform(ListToCheck, each Value.Is(_, List.Type) or Value.Is(_, Record.Type)), each _ = true))

If that works, you can convert it to a function with (didn't check this one but I think it will work)

(listname as list) =>

let

x = List.Count(List.Select(List.Transform(listname, each Value.Is(_, List.Type) or Value.Is(_, Record.Type)), each _ = true))

in

x

Pat