The ballots are still being counted. The middle grey areas are races that are still too close to call or don’t have enough ballots counted to say definitively.

7 gained means so far the democrats have flipped 7 seats previously held by republicans.

That is never going to happen. He’s maintained at least 60% voting power, so he can’t be voted out, and he’s certainly not going to voluntarily give that up. He wants to be synonymous with Meta/Facebook and entrench his power as an oligarch.