A cloud-based identity and access management service for securing user authentication and resource access
The filter on Entra Portal only currenctly support one tag at a time. There is no road map for when this will be implemented. You are invited to create a feature request here. https://feedbackportal.microsoft.com/feedback
However, there are advance filtering capabilities that come with Powershel SDK or Graph Explorer
The closest I have gotten to is
GET https://graph.microsoft.com/v1.0/applications?$filter=tags/any(c:c eq 'tag')&$select=tags
You can play around with this and see if you can fit startswith and contains or endswith on this query. Powershell should support this because it uses Graph internally.