I been searching the whole Forums trying to figure out how to use Filter for multiple search. Using a SharePoint List.
l'm using the following Formulas to search for Patient Name
Filter(COVID19Test, StartsWith('Patient''s Last Name, First Name',TextInput1_1.Text))
Center is a Lookup call "Center Name"
Date of Birth is a "Date and Time"

Hope i explain myself clearly 🙂 and always thank you in advance.👍
Let me know if you need more information.