Hi, you can make changes to the form from your D365/CDS environment.. I am not sure if there are any implications on deactivating the Profile Web Page, as there are some redirects to that page throughout the Portal
You can easily remove the Public Profile and other fields in your form
The documentation is quite extensive: https://docs.microsoft.com/en-us/powerapps/maker/model-driven-apps/create-design-forms
simply go to make.powerapps.com --> solutions --> create your own as best practice --> add the Contact entity --> add the existing form Profile Web Form
open the form and make the changes you need
to hide the "contact preferences" you can change the Site Settings Profile/ShowMarketingOptionsPanel value to false
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