There's no hard limit on workflows that can be scheduled. But if possible can be scheduled to run at different times that will help system to manage resources effectively.
Also you can have 20 workflows concurrent scheduled at 7am. Again if you're planning to run more than 20 at 7am reach out to adobe customer support and if possible discuss with Marketing team to schedule at different time depending on the use case.
There's no hard limit on workflows that can be scheduled. But if possible can be scheduled to run at different times that will help system to manage resources effectively.
Also you can have 20 workflows concurrent scheduled at 7am. Again if you're planning to run more than 20 at 7am reach out to adobe customer support and if possible discuss with Marketing team to schedule at different time depending on the use case.