I performed a fresh install of macOS Ventura 13.0 and applied the update 13.0.1 in a 2019 iMac 27. Apple's Mail application does not synch rules with other computers sharing the same iCloud account. Smart mailboxes are created and when the computer boots again they are deleted. And finally, new rules are not persistent, in the way they get deleted after the session is closed.
iMac 27″, macOS 13.0
Hello there FlightLevel,
Welcome to Apple Support Communities. If the mail rules aren't syncing across your devices for the iCloud email, we suggest adjusting the rules from the iCloud website. The steps to do so are found here:
Set up rules to filter email in Mail on iCloud.com - Apple Support
Let us know if this helps, or if you're having a different issue,
Best regards!
Hello there FlightLevel,
Welcome to Apple Support Communities. If the mail rules aren't syncing across your devices for the iCloud email, we suggest adjusting the rules from the iCloud website. The steps to do so are found here:
Set up rules to filter email in Mail on iCloud.com - Apple Support
Let us know if this helps, or if you're having a different issue,
Best regards!
Mail rules and smart mailbox not working in Ventura 13.0.1
