A group of Microsoft Products and technologies used for sharing and managing content, knowledge, and applications.
I understand how confusing this can be, especially since the issue only affects newly uploaded files.
In the meantime, you might consider trying the following:
-Check the Title field for one of the newly uploaded files under Details or Edit properties to confirm that it contains a value.
-Check the Title property in the PnP Search Results web part to make sure it is still configured to be displayed in the search results.
If the Title is populated and the configuration is correct but the issue continues for newly uploaded files, I recommend raising a support request with Microsoft Support, as they can investigate the SharePoint Search indexing behavior for the affected library.
For further instructions, you can follow this guide: Get support - Microsoft 365 admin | Microsoft Learn
Thank you for your understanding.
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