Hi @宇 黎 , thank you for posting in the Q&A forum.
Adding hyperlink or text overlay to image feature and also the menus are not available in Image Web Part in SharePoint Server 2019. This is by design.
I suggest you open a post via the SharePoint UserVoice forum to share this idea if necessary: https://sharepoint.uservoice.com/forums/329214-sites-and-collaboration?category_id=203542
If an Answer is helpful, please click "Accept Answer" and upvote it.
**Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread. **