Why does my git lfs not push some .dll files even though they are not added to the .gitignore file?

Question

Git does not push some important dll files even though the .gitattributes file includes *.dll. .gitattributes .gitignore

Here the asset AWSSDK.Lambda has been added. Assets in the unity project

As seen here, the file is not added in the lfs files. git lfs ls-files

If I run the git status --ignored: ignored

and if I run the git add /path/AWSSDK.Lambda.dll it says that the path is ignored. But I can't see in my .gitignore file where it is ignored: git add

Does anyone have an idea what I do wrong? Shouldn't the .dll get added to lfs when it is present in the .gitattributes file? If I use add -f it works but I don't want to have to do this for every .dll file.