Show/Hide See all link from SharePoint list/library web parts
When you add a List web part or Document Library web part on modern pages to show the (filtered) list items or documents, it shows See all link at the top right corner of web part as shown in below image. By clicking this See all link, users can navigate to the full list/library page.

But sometimes when you are showing the filtered list views or custom created list views on modern pages, you don’t want other users to access the original list/library and switch between views or modify existing list views. Previously there was no SharePoint out of the box way to hide the See all link from web parts. But, recently Microsoft has added a new option to Show/Hide “See all” button in list/library web part property pane settings.
Show/Hide See All link from SharePoint list/library web parts
Follow below steps to show/hide See all button from list web part in SharePoint online:
1. Go to SharePoint modern page where you have added the list/library web part.
2. Open the page in Edit mode by clicking Edit button from top right corner.
3. Click on the Edit web part button against your list/library web part.
4. Toggle Show “See all” button option and change it to Hide “See all” Button as shown in below image.
5. Click Apply button.
6. Click on Publish/Republish button to save the changes to the modern page.

Here’s how the list/library web part will look after you hide the “See all” link from web part settings:
