Missing Accessibility settings for Text to Speech

I installed gnustep-gui-runtime and am using the CLI "say" command.I would like to configure a different voice, and was expecting to find:

Settings-->Accessibility-->Vision-->Spoken Content

but, instead, I see:

Settings-->Accessibility-->Seeing (not Vision)  without Spoken Content

How can I configure the gnustep Speech Engine?

Ubuntu 22.04 (gnome)