Can check suppressed alarms form Nas_Trascation_log file.
here are the queries:
SELECT * FROM NAS_TRANSACTION_LOG WHERE type = 16;
If looking for time range(example 7 days)
SELECT * FROM NAS_TRANSACTION_LOG WHERE type = 16 AND time >= DATEADD(day, -7, GETDATE());
For explicit range between Jan 1st to Mar 3rd
SELECT * FROM NAS_TRANSACTION_LOG WHERE type = 16 AND time BETWEEN '2026-01-01' AND '2026-03-03';
Note: type= 16 is for suppressed alarms. You can also check from nas history.