There is a thread which shows ver6 will not run on Ventura
What is the error from mongod.log now?
You have to downgrade to lower version
Regarding os upgrade did you check this thread
Stennie clearly mentioned after os upgrade mongod is not allowed to access /data/db in some versions of Macos
If you used brew services to install it will take care of all necessary permissions directory path etc
The reason it worked before is /data/db is accessible in older version but not in your upgraded version