On landing the spoilers are delayed pretty damn quickly = PDQ. The lift is dumped. The brakes are ON. IMHO neither wing will be producing any significant lift.
Please see
https://www.youtube.com/watch?v=7P9OAng32F0 from 5:24 and note the oleo extension visible on both main gears.
At 5:33 the ground spoilers are fully deployed. Note the oleo extension visible on the LHS but RHS seems to be fully compressed.
MED autobrake is attempting to achieve the selected deceleration rate 2 secs after spoiler deployment.
On which side do you think the wheels are carrying more weight?
I'm sure they researched the lift dump phenomena during the design of spoilers and brakes and the stopping calculations including that of RTO.
This crosswind effect only transfers some weight from one side to the other. The total weight on the tyres remains unchanged.
And unless there was an anti-lock brake release on the upwind gear (unlikely on a dry runway?)
If the weight is sufficiently reduced on one side and the applied brake pressure too great to prevent tyre slip then the anti-skid unit will reduce braking effort on that side.