Sadly this situation with the latest releases of macOS (Sequoia), iPadOS 18 and iOS 18 is really critical.
After updating to this versions, there is for example no German quality voice left ("Anna" has gone). The Eloquence voice are far away from being usable. And installed quality voices are not listed at all in Safari.
@Apple, please fix this issue, cause it's related to many WebApps.
PS: Chrome and Edge are listing all Voices which are installed on macOS. Only Safari does not.
Jashson
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution