The PlayStation 4 and PS4 Pro can play Blu-ray discs, but not if they're 4K UHD Blu-rays. The standard PlayStation 5 can play all Blu-rays.
Does PS4 Play Blu-ray: How to Play Blu-ray on PS5/4/3
Sony PlayStation 5 Slim Console – Marvel's Spider-Man 2 Bundle (Full Game Download Included) White 1000039815 - Best Buy
Blu-ray on PlayStation 4: An Introduction.
PS5: PlayStation 5 Consoles
How to Watch Blu-Ray & DVD Movies
Does PS4 (Pro) Play Blu-ray? Yes, It Does, and Here Are 2 Ways
Does a PS4 Play Blu-Ray? Here's What You Need to Know, sony playstation 4
Does it play? on X: First thing we tested was Blu Ray compatibility out of the box. The PS4 required a one time internet connection to play any Blu Rays and on PS5 this is no longer the case. Blu Rays (Even 4k Blu Rays) can be watched offline out of the box
Does a PS4 Play Blu-Ray? Here's What You Need to Know, sony playstation 4
Does a PS4 Play Blu-Ray? Here's What You Need to Know
PlayStation 5 - Wikipedia