BCP- IT Disaster recovery

For this mapping, I suggest you take a look at these templates (although they are related to ITIL, they can be applicable to ISO 27001 IT Disaster Recovery):

• Service Catalogue https://advisera.com/20000academy/documentation/service-catalogue/
• Configuration Management https://advisera.com/20000academy/documentation/cmdb/

The first can help you as a custodian of the information about all operational services.
The second can help you record all configuration item-related data.

These articles will provide you a further explanation about service catalog and configuration management:

• What is the relationship between Service Level Management and the Service Catalogue in ISO 20000? https://advisera.com/20000academy/blog/2016/04/12/what-is-the-relationship-between-service-level-management-and-the-service-catalogue-in-iso-20000/
• Knowing your herd – Service Asset and Configuration Management (SACM) https://advisera.com/20000academy/blog/2013/06/04/knowing-herd-service-asset-configuration-management-sacm/