I have exactly the same issue.
Owner profile: no google
Google profile: GPS, framework, play store. WhatsApp and gmail. All notifications enabled, included cross profile, all battery unrestricted.
Banking profile: GPS, framework, play store. Banking app. All notifications enabled included cross profile, all battery unrestricted.
Not sound or vibration from WhatsApp or gmail on Google profile BUT I do receive notifications and sound from banking profile.
Also get whasapp calls on owner profile but I'm unable to switch profile and actually get the call.
Hoping for a solution.