Hello @Carlos_Acosta and welcome to the community,
I believe what you are looking for is known in Bitwarden as nested folders for individual vaults, or nested collections for organizational vault items.
There is a currently planned UX update on the roadmap (partly under the Navigation Vault Refresh I believe?) that will allow for folder/collections to be nested with a GUI selector to a parent folder/collection as I understand that should hopefully come out shortly.
You can find an example of some of the planned features here.
This will make it easier and more intuitive for users to create these nested objects instead of having to be created with parent/subfolder