What is stopping you from creating the function yourself?

Should be easily implemented, the in-function takes a list and a value and does a ListFilter and provides a boolean Found based on the ListFilter result.

The Between function takes a minimum, maximum and a value (possibly also includeMinimumBoundary and includeMaximumBoundary boolean options, to distinguish > >= and < <=) and it provides a boolean IsInBetween based on basic check logic.

there are many ways to implement it i know , but no all new commers know this , and as frame work its small feature need to be add