If the PC Health app says you are good to go then you should be fine. Now MS does have a bug in Windows 11 that causes systems that pass the health check to not be able to update. They are working on it and more on that in this post. You can manually update if your 5579 passes the health check by downloading the media creation tool here (it is the second choice).  But there is one catch here. Your system is not on the Dell compatibility list for Windows 11 even though the health check says you are good to go. So if you do install Windows 11 and down the road you need Dell service, Dell service will insist that you reinstall Windows 10 before they will offer assistance.
the 5579 doesn’t have tpm 2.  Is there anyway to add it so I can install windows 11
5579 and tpm