The French blog post seems to include a line that the English version didn't. Here's the translation which I've checked with someone and the translation is correct:
https://blog.fr.playstation.com/202...ons-bientot-apportees-aux-niveaux-de-trophee/
Shame it doesn't seem to work retroactivity for PS4 games, but at least it's now there. It's been my biggest request for the trophy system.
Sur PlayStation 5, vous pourrez suivre vos progrès vers l'obtention de trophées individuels pour les jeux PS5 compatibles. Par exemple, vous verrez parfois le nombre d'artefacts qu'il vous reste à collecter, ou le nombre d'améliorations d'armures que vous devez obtenir avant de débloquer le Trophée.
https://blog.fr.playstation.com/202...ons-bientot-apportees-aux-niveaux-de-trophee/
Shame it doesn't seem to work retroactivity for PS4 games, but at least it's now there. It's been my biggest request for the trophy system.