I have published a new release of Attachments component compatible for both Joomla 4 and Joomla 5, the version v4.1.1
The release is available on github. 
attachments
I am now contributing for this component.
  attachments-4.1.1.zip | 0 kB |
New features of version 4.1.1
- Add download link to be able to view attachement in a popup or download