If the button is displayed but is not working, check your Peertube logs.It could be because the remote service does not use standard scopes or attribute names.
Following settings concern the advanced channel options: users will be able to add some customization on their channels, activate the moderation bot, ...
This feature enables a «share chat link» modal. With this modal, you can generate URLs to join the chat.The chat can be customized (readonly mode, use the current theme, ...).