The AWS docs for Pinpoint Mobile Push imply that to shift from a working 'Immediate' to a 'Daily' delivery is a simple change on the campaign options. But, with 100% success rate for the 74 current endpoints, it shifts from a high delivery rate to a zero rate when the 'Daily' option is selected.
There doesn't seem to be any other options needed to shift from Immediate Push Notifications to Daily. I've also posted this on AWS forums, but haven't yet found an answer.