If you are referring to the World-Check One UI, then yes, you can disable/enable ongoing screening for upto 25 cases at a time. If you are referring to API, then only 1 case can be enabled / disabled per API call.
We do not have any other backend procedure apart from the above mentioned to carry out this task.
Thank you for your query.
Ongoing screening can be switched on / off for single case using the World-Check One API. Please let us know if you wish to see this functionality as a future enhancement and I'll be happy to raise an enhancement request on your behalf.