I think this is just a limitation people have to deal with now as it is a fairly new feature.
I don’t know if this will help but you could look to open up a support case as well.
Here are the steps to open a support case. If your company has someone who manages your AWS account, you might not have direct access to AWS Support and will need to raise an internal ticket to your IT team or whomever manages your AWS account. They should be able to open an AWS Support case on your behalf. Hope this helps!
Sorry but it’s not ‘‘just a limitation’’. We are using it for the Point of sale, so sellers will not wait for the whole 5 min to generate a PDF, it’s aboslutely not acceptable to take so much time.