Hi Sandro,
If you have support from the vendor, ask them to provide you the SCOM management pack for it. Then you can just import it and use it.
Here is a link to the MP documentation: https://systemcenter.wiki/ContentLibrary/Brocade%20SAN%20Management%20Pack/brocade-microsoft-pack-ds.pdf
Otherwise I believe you would need to author your own SCOM MP using SNMP, if you know the OIDs/have the MIB. Here is an old tool that still works and can help you:
https://www.microsoft.com/en-us/download/details.aspx?id=54083
Here is also a guide to get you started: https://cloudbunnies.wordpress.com/2018/07/30/opsmgr-snmp-management-pack-generator/
Good luck!