For our region that limit is set to 1000. That might sound like a lot when you start, but you quickly realise it’s easy to reach once you have enough Lambdas and you scale up. We found ourselves hitting that limit a lot once our traffic and therefore our demands from our system started scaling.
You can file a support ticket to have that limit raised.
https://docs.aws.amazon.com/servicequotas/latest/userguide/r...