How to change the rpId (Relying Party ID) in Django-Allauth

I'm trying to implement passkeys, more or less like https://react.demo.allauth.org/account/login. It's working at localhost, but when I deploy my application I'm not able to login because the rpId contains my back-end domain (api.example.com) which is a subdomain of my front-end (example.com):

SecurityError: The requested RPID did not match the origin or related origins.

In the example project here https://react.demo.allauth.org/account/login is a similar structure as the back-end is running on a subdomain (api.react.demo.allauth.org) of the front-end domain (react.demo.allauth.org). And when I click "sign in with passkey" there is a response with the right Relying Party ID:

{
    "status": 200,
    "data": {
        "request_options": {
            "publicKey": {
                "challenge": "_5CEZrt...",
                "rpId": "react.demo.allauth.org",
                "allowCredentials": [],
                "userVerification": "preferred"
            }
        }
    }
}

In my case the rpId is "api.example.com". How do I change the value of this field so it is "example.com"?

I can't find anything in the docs, so I've tried some guesses: setting my SESSION_COOKIE_DOMAIN to example.com, and I've added django.contrib.sites so my requests use a Site with domain and name example.com. But so far nothing that affects the rpId property.

Fixed it by adding this to settings.py:

MFA_ADAPTER = "myproject.mfaAdapter.MFAAdapter"

and in myproject/mfaAdapter.py:

from typing import Dict
from allauth.mfa.adapter import DefaultMFAAdapter


class MFAAdapter(DefaultMFAAdapter):

    def get_public_key_credential_rp_entity(self) -> Dict[str, str]:
        return {
            "id": "example.com",
            "name": "example.com",
        }