I don't think there is anything you can do through Jamf - I couldn't find the correct settings for a configuration profile. If you don't mind touching each ipad, you could change the autolock setting - it's in Settings->General->Auto-Lock. Set it for how long the ipad will wait before locking. Options are 2 Minutes, 5 Minutes, 10 Minutes, 15 Minutes, or Never.

You should find this setting in the Passcode payload.

The setting in the Passcode payload is for Maximum Auto-Lock, which adjusts the user's menu in Settings. I think you'll need to touch each one.