Hi @PP_SS,
There used to be a brief management http interface but it was removed:
https://docs.mongodb.com/manual/core/security-hardening/#http-status-interface-and-rest-api
To access the database via UI we recommend connecting via compass product:
You can also connect this instance to our Cloud Manager service and use data explorer via the automation agent:
Otherwise a driver or a mongo shell can show collections and query them.
mongo ...
Thanks,
Pavel