In my opinion, the biggest change in PS5 is his handle, ds5 and ds4 difference is not spoken, you must experience it by yourself, so the games recommended to you are basically games with ds5.
1. Astro's PlayRoom
The free game comes with PS5. You can experience all the features of ds5 in this game, the only drawback may be that the process is a little shorter. I probably played for about 15 hours.
2. Demon's Souls Remakes
3. Marvel Spider-Man: Miles Morales, it really amazing when you play it.