Is there seriously no way to have the Preview aspect ratio different from the Timeline?

This is driving me insane. I want my Timeline resolution to be vertical (1080x1920) but I want my Source Viewer to be the native aspect ratio of the raw footage. Why is this impossible to do in Resolve? It's absolutely ridiculous that this is at all a problem.

Can anyone help me out with this? I will HUGELY appreciate it!

Working on PC, Davinci Resolve 19.1.3.