What I did to unlock this and it is still viable as of today 2022. This won't get you banned or whatsover so don't worry about it.
Use an existing save-file, any while playing ONLINE. Then during your game session hit the
Options button. Go to OPTIONS, go to the tab ONLINE and switch the game type to "SINGLE PLAYER". Make sure to press
to confirm it. Check again to make sure. Now quit the game from the menu hit
. Now quit the game app entirely.
On your PS4 dashboard got to SETTINGS > NETWORK > UNCHECK "connect to internet" or simply disconnect your console from your internet by other means.
Now go to SETTINGS > DATE AND TIME > change the time, fast forward by a month or even more. Make sure you don't go backwards in time.
Then start up the game again while OFFLINE, still
not connected to the internet and the trophy will unlock by the time you've reached the main menu! No need to start up any save-file.
After that feel free to connect your console again and synchronize your trophy list.
Give the solution a thumbs up if it worked.
Hope this helps!
Let me know what I can do to improve this guide and I'll adjust.