Yes, it can be acheived by having MongoDB instead of OOTB TarMK. Except this I don't think you can have more than 1 active author at a time.
But, MongoDB will typically be used for supporting AEM author deployments where one of the following criteria is met:
- More than 1000 unique users per day;
- More than 100 concurrent users;
- High volumes of page edits;
- Large rollouts or activations.
The criteria above are only for the author instances and not for any publish instances which should all be TarMK based. The number of users refers to authenticated users, as author instances do not allow unauthenticated access.
Refer here fore more information
https://experienceleague.adobe.com/docs/experience-manager-64/deploying/introduction/aem-with-mongodb.html?lang=en