Importing existing Azure resources and services

Trying to import existing resources to current code which involves KeyVault, diagnostic settings, cosmos db, storage accounts with containers blobs que with function apps. All code written using modules.

Tried multiple ways but none of the resources are getting imported and imports failing. When I import storage account, it shows some errors with tenant/subscription mismatch with KeyVault or diagnostic settings. Same happens with cosmos db and all.

All resources in same tenant/subscription/resource-group.

After trying enough I feel whether it’s even possible to import them.

Requesting bestways to import these. Any suggestion or solution will be gladly appreciated.