Hi,
Depending on the context, different terms may be used to refer to Delete/CanNotDelete lock. For example, in the Azure portal, you can see it is referred to as Delete lock:
When using CLI, it is referred to as CanNotDelete, which is same as the underlying REST api:
For learning purposes I recommend you understand the difference between the two types (Delete/ReadOnly) of locks, and that Delete/CanNotDelete are referring to the same thing.
If the above is useful please click Accept Answer.
Thanks.
-TP