It is unclear just how to 'install' the PWA on a mobile device.

Cut from the announcement......

Each user is free to accept (or refuse) push notifications from your forum or to install its PWA on his mobile devices by accepting/refusing the invitation offered by the forum for this purpose.


On the one hand you say a user doesn't have to do anything and then there is the above note.

Please clear this up.

the announcement means that the admin doesn't need to do anything like activating the feature from the admin panel
it is automatically added to all forums ...
each member individually has the choice to accept it of refused it

How does a member do so.
I have looked at both my iPhone and iPad and the iMac and see no such choice to make.

example

I am sorry, but you need to be more helpful.
There is a mention of making a change to activate this PWA.
I have downloaded Chrome to my iPhone and have chosen the 'mobile version'.
What do I do from there. I already receive 'notifications' as has been the case since setting up user options long ago on the desktop.

I don't see anything like your last screenshot at the phone interface.

Please walk through this step by step with clarity and as you go those things that are supposed to differentiate from before including the PWA at the main Admin panel.

Or how does a member accept or refuse?

This is clear as mud.

https://caniuse.com/#search=pwa

Safari & Chrome for iOS 13.3 not supported.

Thank you.

is this solved?