Rear wheel sideways "play"

Cheap wheels ill always have a little bit of play. But we are talking 2-3mm at the tyre. More is going to damage the bearings and risk braking the axle.

If its 2 months since you bought it it is warranty, so take it back to where you bought it and get them to sort it out.

But the stock Fuji Track wheels are very poor quality.

Sound Advice.