If not, are there workarounds? Maybe a separate generic app that iOS users could optionally download which would enable native notifications pushed from various backends (not only your PWA, but any PWA)? If this doesn't exist, should it? And would people pay for it?
No date atm. There's a lot of rumors and the prefered one it's Apple make too much money of apps and if they gave the PWAs the possibility to receive notifications this will hurt them. But I don't rly believe that. Pwa are great but not rly ready to replace native apps. We always have clients that want native apps even if a basic web site (not a pwa) do the trick.
> Are there workarounds?
None.
> If this doesn't exist, should it? And would people pay for it?
I've already ear that solution (here I think?). But yeah if this doesn't exist it should be invented. And if ppl don't want to pay for it, you can have a free version with sponsored notifications.