Ahhh you’re right!
I am using Horizon, sorry I forgot to mention that. I was limiting the main-outlet width to make room to nudge the sidebar over so it wasn’t hugging the edge of the screen.
I reverted those changes so now the login screen takes up 100% of the screen like it’s supposed to. Sidebar has to touch the edge of the screen now but that’s not nearly as bad of an issue.
Thank you!