how to remove Mac_SwapperDemon from Sequoia OS

I have a couple of login items, which I want to remove as they are from unidentified developer. One is Mac_SwapperDemon and the other is PPPMonitord. I cannot see how to remove them from the login and extensions folder. I read somewhere to delete SwapperDemon in the Activity Monitor which I did but that file does not appear in the Library>launchagents where I was told to look. As for PPPMonitord, I have not tried anything. How do these things come to be where they are? Any help is massively welcome!