Does mongodb community operator supports sharding architecture?

Does mongodb community operator supports sharding architecture? If no what are the alternate open source operator options which supports the sharding setup

https://github.com/mongodb/mongodb-kubernetes-operator/blob/master/docs/architecture.md

It does. The main features in Enterprise Edition which are not available in Community Edition are these:

• In-Memory Storage Engine
• Auditing
• Kerberos Authentication
• LDAP Proxy Authentication and LDAP Authorization
• Encryption at Rest

See https://www.mongodb.com/docs/manual/administration/upgrade-community-to-enterprise/

There are a few more functions in Enterprise, but they are minor.