SQL code to check if the database has TDE encryption enabled.
SELECT
db.name,
db.is_encrypted,
dm.encryption_state,
dm.percent_complete,
dm.key_algorithm,
dm.key_length
FROM
sys.databases db
LEFT OUTER JOIN sys.dm_database_encryption_keys dm
ON db.database_id = dm.database_id;
Source
https://stackoverflow.com/questions/61513305/check-if-my-database-instance-on-sql-server-is-encrypted-by-tde