The Tau 7 is a different design and isn't handed as such - it requires fingers on both sides both for cocking and loading which can done with either hand.
Most of the modern cheapies such as 2240, 13xx, CP1 etc are all on the right whereas the earlier Crosman models were similarly universal with sliding covers and either rear cocking or dual sided cocking.
But then again having the bolt on the right will good for the lefties