The same applies to the bundled WebP plugin.
Also, the DDSFileTypePlus description should be changed now that Paint.NET no longer has an 'internal' DDS filetype.
Perhaps it should say something like:
Bundled with paint.net 4.2.2 and later, allows paint.net to open and save some of the DDS formats introduced in DirectX 10 and later.
Source code has been made available on GitHub.
I am not sure that tagging the plugins as integrated is appropriate, as it may imply to users that the plugin is finished and will not receive any more updates.
As @Rick Brewster stated in the release notes for 4.2.2, paint.net will still search for the bundled plugins in the FileTypes folder, and will use the newest version it finds.
Read his blog post for more details.
https://blog.getpaint.net/2019/09/18/paint-net-4-2-2-is-now-available/