It definitely seems related to DPI settings. I have both monitors at 4k with 200% DPI, and I see the issue regardless of the application DPI settings I use. However, if I set both monitors to 100%, I can see the text again. So there's something to do with 200% that's causing an issue.

FYI: I'm ...

Unfortunately I'm seeing this issue as well on my machine. I am using Windows 11 with a 2 monitor setup and the tree does include a scrollbar. Example attached, please let me know if there's anything else I can provide that would help!