I have been running XtraFinder under the newest Catalina beta for a month now and had absolutely no problems with it at all. I went so far as to purchase XtraFinder. I love having the old tag color scheme from OS9 and it has so many other really cool features. I am super impressed. I am not affiliated with the developer and just happened upon it on MacUpdate.

XtraFinder add tabs and extra features to Finder: - Tabs (experimental) - Dual panel, dual window - Arrange folders on top - Cut and paste - Global hotkeys. - “Copy Path”, “Show Hidden Items”, “Refresh”, “New File”, “Copy to”, “Move to”, “New Terminal Here”, “Contents”, “Select…”, … . - Light text on dark background - Colorful icons in sidebar. And more