Something that's quite plausible within the CP2077 world, that are part of the lore are Braindance, and VR experiences.
I'm personally quite keen and interested in all the many number of ways VR and Braindance can be leveraged within the game to give a unique experience in exploring worlds that are NOT Night City.
I'm not talking about VR for you, the player, with your Oculus, or whatever device, but, VR for your player character "V".
I've written about this before, and have posted some things in the
Story Line Suggestions thread.
THIS POST, for instance, details how CDPR could use old assets from The Witcher series to transport the player character to The Witcher universe, or, at least something resembling such. Just as we got to play Ciri for some sections of The Witcher 3, a VR quest could put us in the shoes of a fantasy character, or give us a choice between a few archetypes, where we then do a quest, or some number of quests within that fantasy landscape with those fantasy rules of swords, and magic and such.
Additionally, besides leveraging old assets from The Witcher, other unique encapsulated worldscapes could be built for V to explore, and complete quests within, other worlds with their own particular rules, physics, and styles.
One could find themselves in a cartoon 2D side-scroller like Cuphead (or something similar), for instance, and other strange landscapes like dusty old forgotten VR game spaces with degrading data, missing models, and other hazards that some net runner has found and coopted for something that the player eventually encounters in working for or against that net runner.
There could be a a nod or two in the direction of The Matrix where the player finds an old hardline phone somewhere ... and it's ringing. When V picks up the phone, they're transported into a VR experience, an escape room, or something, designed to test their skills by some mad crafty NPC quest-giving character that will contact them and give them a quest if they solve it.
These ideas are, I guess, not entirely mini-games, but, live in a gray area somewhere between mini-game and side-quest.
Whatever the case, I'm quite partial to, and excited about all the possibilities and potential in-game VR could and can be leveraged to give players MUCH more of an experience than just the world of CP2077 Night City.