There may be a request from your customer where you need to hide contact preferences options on the PowerApps Portal Profile page.
Where can I find this contact preferences option?
1. Log in to your PowerApps portal
2. Click the "Profile" menu
3. Scroll down to the bottom until you see the below option
How to hide/remove the contact preferences?
Step 1: Log in to Portal management
Step 2: Under Website > Site Settings
Step 3: Find the setting called "Profile/ShowMarketingOptionsPanel"
Step 4: Set the value to "false" > Save and Close
In Portal Studio > Press the Sync configuration and Browse the website.