If you are embedding Rocket.Chat in Pages using Embed Component, you can change Rocket.Chat’s layout by adding ?layout=embedded after your server URL. This option works wonder allowing you only show a desired channel embedded to a page.
Setting a URL to embedded mode will “lock” that view in a single channel (since the user will not have access to the channel lists).
Example
https://rocket.claromentis.net/channel/product?layout=embedded
Adding this to the URL will change the layout of Rocket.Chat to a more “simplistic” view, hiding the left side bar with the channel lists and account management buttons.