How to Create job for De-identification template in GCP DLP?

Question

I am new to DLP so may have limited visibility w.r.t to DLP Services.

I have created one DE-IDENTIFY Template for data Masking. I want to use that DE-IDENTIFY Template over a few BigQuery tables but I am not getting any direct way to do that like the INSPECT Template that provides INSPECT Job in DLP itself.

Do I need to write a custom job for all the De-identify use cases? if yes then where I can run that custom logic DataFlow, DataProc, GKE, Cloud Function or else ?

I have checked the Dataflow template but that does not provide any template for Bigquery only. Most of the templates are for data ingestion such as from Cloud Storage to BigQuery. Not for the data already stored in BigQuery.

Is there anything that I am missing? I am using asia-south1 region for the Testing. Please help me to understand the use case of it.