It's not about him being happy. It's sensible give yourself a good bargaining position by not signing a new deal.
On the other hand i'm not ruling it out. Just like White did, he might feel confident enough in his ability to attract bids and that will sell for a sensible price to sign a deal this week. It's not the most likely scenario, but far from impossible.
But Ben White did the right thing - he took a new deal for a big pay rise, played a season, got another move.
Bissouma could have / should have done that last summer in my view.