@Vlad on my first and second posts on this thread I mentioned that only Safari 16 (and later) supports the Web Push API, used Twitter as the example (with screenshots), and even linked to the documentation of both types of notification types... I'm confused as to why this topic is going around in circles 😕
That said, pushassist.com doesn't seem to work for me either.
I'm testing with this one: https://cleverpush.com/en/test-notifications/
And these are the results I get:
Safari 16.x
Arc browser:
Orion 0.99.124.4.4-rc (WebKit 616.1.14.11.1):