A developer has installed macOS 10.15 and has posted this screenshot of the Media Sharing pane in System Preferences:
https://forums.macrumors.com/attachments/screen-shot-2019-06-03-at-5-08-25-pm-png.840459/
It refers to Home Sharing and Sharing photos with Apple TV so, for now, it looks OK. Note however that it refers to "downloaded music...".
Thanks for the link, I'm a big user of home sharing - it would be... not nice if it were to go away.
I'm not worried about "downloaded" music, suspect that's just wording to differentiate against music in the cloud.