Hello BhupeshG,

Yes it should work. You can add other catalogs to which the item belongs to. These catalogs should be accessible through the Service portal.

Please, have a look to this post:

https://community.servicenow.com/community?id=community_article&sys_id=6102c789db4a10506621d9d96896191a

There is a video that shows a request of a cloud catalog item from the service portal. The resource pools are working (ex: the template of the VM is dependent on the application field)