First, is this article and Mobile push notifications the latest info?
It seems to me, if you have to use a plug-in that you can not have a web app, and therefore no PWA.
A sample with Voltbuilder would be nice and apparently not many modifications to the code. Mainly the docs. I’m not familiar with pushwoosh, but there are several Android and iOS services, all basically the same, just formatting differences in the calls. I was looking at AWS SNS to originate the push message, and they do not seem to support the pushwoosh. But I just started looking at this new capability that would way preferable to texting or emailing notifications.