@Andreas_Hegenberg I'd really like BTT's text replace to sync with macOS text replacement. I'd take that even if it's a bit buggy.
Could you suggest any way to do that (e.g. with python or AppleScript) if there aren't plans to add this to BTT?
Resources (did some homework in case this helps):
MacOS's text replacements are stored here:
~/Library/Dictionaries/CoreDataUbiquitySupport/
Source: macos - Where are text replacements stored? - Ask Different
They can be exported as a plist file at least manually through Apple's GUI in system preferences