The new Ventura MacOS should be officially available today.
After the previous update, when it was not possible to run the HCL Notes client for several days, the question is whether the Notes client will be functional after the update.
There is an article in the HCL Knowledge Base that confirms that the latest version of the Notes client 12.0.1 is functional on macOS Ventura. The only minor issue may be after a new install with the first run. This will be addressed in version 12.0.2, which will be available probably in the second half of November. You can follow the full article and possible update at this link https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0101181
Still, before upgrading to Ventura, I recommend checking the actual information in the HCL article mentioned above to ensure that the Notes client will indeed be fully functional