I would like to not upgrade to tahoe yet, can I resolve this any other way?

Weirdly, if I use styleMask: [.fullScreen] the issue with the menu bar does not occur, meaning the height is correctly the fullscreen height. But I need it to be .borderless instead

I fixed the second issue with window.collectionBehavior = [.canJoinAllSpaces], still need to figure out the menu bar height