PS5 VR code work on base ps4 or just ps5 Backwards Compatibility

So if we bought game on psn store it show ps4/5 game … mean you get both ps4/5 version i dont know when bought ps5 disc version how can we access free ps4 copy? ps5 do read ps4 disc but ps4 wont read ps5 disc the vr code in ps5 version box just Backwards Compatibility running on ps5??? or we do get a free base ps4 version?! thank you

PS5 may 'exhibit errors or unexpected behaviour' when playing PlayStation 4 games, Sony warns

Every Game Getting a Free PSVR 2 Upgrade (so far)

PSVR Is Backwards Compatible With PS5, But You'll Need A Different Camera - Game Informer

Will PS5 Be Backwards Compatible With PS3, PS2, and PS One in Update? - PlayStation LifeStyle

PlayStation VR Will Be Backward Compatible With PS5, For A Price - VRScout

PS5 Review: Is it still worth buying in 2023?

No Man's sky VR only available via backwards compatibility on PS5. : r/PSVR

PlayStation VR Will Be Backward Compatible With PS5, For A Price - VRScout

PS5 Game Boost: All Major PS4 Game Improvements