The PS5 version of Battlefield 6 has the entire game on disk, no need for downloading

What matters more than that is is any part of it is playable offline, like at least the campaign... Like if the whole game is online only then being on the disc is irrelevant.

Tbh if they offered an offline multiplayer mode with bots my mind would be blown, this would become my new favorite game.

I mean, yeah , except the 200 gig day 1 patch that includes important graphic updates, like new mud textures.