Hi @MiteshGovan,
Based on the issue that you mentioned, do you want to filter by a specific visitor based on your existing formula?
Could you please share a bit more about the scenario?
Sort(Filter('Medical',Status=Dropdown1.Selected.Value, Visitor="STAFF"),ID,Descending)
Or if your Status column is a Choice type, please try the following one:
Sort(Filter('Medical',Status.Value=Dropdown1.Selected.Value, Visitor="STAFF"),ID,Descending)