Cyberpunk 2077 lead quest designer Pawel Sasko said that there are still unfound Easter eggs in the game. He also hinted at the location of one of the secrets.
The developer told IGN about this at Game Developers Conference 2024. According to him, he looked at the list of Easter eggs already found and found it incomplete.
There's a couple more things that are not found yet. [At least] we don't know that they were found, because someone could have found them in their home and never shared them with anyone, and we just never saw it.
As Pavel Sasko noted, one of the secrets is connected with the pay phone in the Captain Caliente diner in Dog City. It turns out that there are several more numbers that players have not yet entered.
If you also want to join the race for secrets, we recommend reading our guide to all the phone numbers in the Phantom Liberty DLC. Perhaps you will be the one to add to this list.