To enable the search functionality, you need to set the one2many_search widget for the desired One2Many field in your Odoo form view. This can be done by modifying the XML view definition of the form to include the widget="one2many_search" attribute for the One2Many field. Once set, a search bar will appear above the One2Many field, allowing users to filter records.

Yes, the One2many Search Widget supports filtering for both text and numbers. Users can enter text or numeric values in the search bar above the One2Many field to filter the displayed rows based on the entered criteria. If the search bar is left empty, all rows in the One2Many field will be visible.