Sql Server - View the structure of View

I ran the following commands on the Sql Server database:

comando 1:
SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME = 'vendas'

resultado 1:
TABLE_CATALOG     TABLE_SCHEMA     TABLE_NAME      TABLE_TYPE    
----------------  ---------------  --------------  ------------- 
Empresa 1         dbo              vendas          VIEW

comando 2:
SELECT * FROM INFORMATION_SCHEMA.VIEWS WHERE TABLE_NAME = 'vendas'

resultado 2:
TABLE_CATALOG     TABLE_SCHEMA     TABLE_NAME      VIEW_DEFINITION     CHECK_OPTION     IS_UPDATABLE    
----------------  ---------------  --------------  ------------------  ---------------  --------------- 
Empresa 1         dbo              vendas          (null)              NONE             NO

comando 3:
SELECT definition FROM sys.objects O JOIN sys.sql_modules M ON M.object_id = O.object_id WHERE O.object_id = object_id( 'dbo.vendas') AND O.type = 'V'

resultado 3:
definition    
------------- 
(null)

My questions are

• The table is even a view , or this is just a description for some other type of table Material

• How to get more information about this table if it is a view , which tables do you build?

• Lack of information from the definition could be a lack of user privilege, how to figure it out?

Edited:

The Microsoft documentation shows that the sys.sql_modules.definition column may be encrypted.