You can check out the challenge here - PSNProfiles - Platinum Difficulty Challenge 2024
The Platinum Difficulty Challenge tasks you to earn one platinum trophy for every difficulty level, ranging from 1 to 10. Any trophy guide that states a game's difficulty can be used. There is no interpretation. If a specific guide states the difficulty, it goes.

For an added challenge, you can cater your difficulty list towards Badge criteria. For instance, No Plat No Problem - Earn 100% base game trophies on a game without a platinum AND Above and Beyond - Platinum a game with an official time estimate of 100 or more hours