Hi Kiran,
You can ask your CSM/Open a product feedback ticket here - https://support.fireblocks.io/hc/en-us/requests/new
asking for integration with the blockchain. Our product team will review and decide if to support it or not.
If the chain is not nativley supported, you can use RAW operations to interact with it with your FB.
You can read more about it here - https://support.fireblocks.io/hc/en-us/articles/4413379762450-Raw-Signing