I don't find in app filter anywhere.may I know it is available or not

Tell me how to do in app filter and where it is.

@Manikandan_R try to add more context when you post a question. This makes it easier to answer

You can read about in-app filtering here

I expect that you want to use in-app filtering in inline list. That is not possible. You can use in-app filtering on basic lists - not on detail screens