You can check whether Change Data Capture is enabled or disable on a particular database in SQL Server using below T-SQL Statement.
usemaster
SELECT [name], is_cdc_enabled
FROMsys.databaseswhere name ='Your_db_name'
Results :
is_cdc_enabled= 0 ---CDC is disabled or not enabled on this database
is_cdc_enabled= 1 ---CDC is enabled on this database
usemaster
SELECT [name], is_cdc_enabled
FROMsys.databaseswhere name ='Your_db_name'
Results :
is_cdc_enabled= 0 ---CDC is disabled or not enabled on this database
is_cdc_enabled= 1 ---CDC is enabled on this database