Hyperledger Fabric is an open-source enterprise-grade permissioned distributed ledger technology (DLT) platform. Where I can ask a question for the same?
Is there a specific community?
This technology has its own non Stack Exchange Community: https://chat.hyperledger.org/ or https://lists.hyperledger.org/ You'll likely find the greatest concentration of experts there, particularly if you're just trying to find out more about the technology rather than having a specific issue with it.
While there is a hyperleger tag on the Etherium site but this meta question suggests that most such questions are off-topic there and should rather be asked on the Bitcoin and Cryptocurrencies site. See that site's tour for more information but it suggests that
Bitcoin and Cryptocurrencies is a question and answer site for cryptocurrency enthusiasts. It's built and run by you as part of the Stack Exchange network of Q&A sites. With your help, we're working together to build a library of detailed answers to every question about Cryptocurrencies such as Bitcoin, Namecoin, Litecoin, Ripple, ZCash, Dogecoin, and NXT.
would be on-topic