We support sharing one consent across multiple properties (sub-domains or multiple domains) by using a shared domain for storing cookies for unidentified users.
We can use one of your domains as the shared domain or privacy-center.org (which is our base domain). We also support the consensu.org domain from the IAB spec as an additional storage of consent and as an option to benefit from global consents if you want to use that part of the spec.
For identified users, we can also rely on hashed emails that you would provide to share consents across multiple domains.
⚠️ AMP is a specific Google Format and sharing consent between AMP and non AMP pages is not possible as far as we know. On AMP, the only action we can do as a CMP is to send the consent to AMP.