Customizing Number Format in Ventura
It appears that in the first release of Ventura the settings which some users need to customize the format of numbers are not available. A workaround for this using the Terminal app was posted in this discussion, and is provided below in case it helps those who need it.
If you have a similar problem with Currency, below is an example of the Terminal command you can try to set that:
defaults write NSGlobalDomain AppleLocale -string "en_GB@currency=EUR"