For large organization - How to connect over a hundred AWS accounts in MDCA

We want to connect AWS to MDCA. After reading the guide https://learn.microsoft.com/en-us/defender-cloud-apps/protect-aws#connect-amazon-web-services-to-microsoft-defender-for-cloud-apps it seems it assumes only 1 account however our organization does have over 100+ accounts.

Do we need to create a separate key for all the AWS accounts and connect it separately in MDCA? Or there is a way to have a single key and cover all the AWS accounts within one connector.

If separate account is required, managing it along with key rotation is challenge and doesn't seem feasible.

Any large organization does have experience with it?