Played on ps4, now it wants me to buy again on ps5 for either

Don't Have a PS5 Yet? Use Share Play to Get PS5 Games on PS4. Here's How - CNET

Why are my PS4 games (that I transferred to PS5) locked and say that I have to buy even though I had it in PS4? - Quora

PS4 vs PS5: Is it time to upgrade?

Is it worth purchasing a PS5 in 2021 or should I buy a PS4? I haven't done any gaming on both consoles. - Quora

I have a PS4, should I buy the PS5 or wait for the PS6, and will I be able to get my games from the PS4 to the PS6 (backwards compatibility)?

PS5 specs and features, including SSD, ray tracing, GPU and CPU for the PlayStation 5 explained

How to Transfer Data From PS4 to PS5

Choosing the Right PlayStation 5

Does PSVR 2 work on PS4?

It Shouldn't Be This Hard to Get a PlayStation 5

PlayStation Portal Review: A PS5 in Your Hands, With Limits - CNET