Just for clarification, repotting in Bonsai jargon means to sort and cut the roots (according to tree type) for various reasons. It would be possible to slip pot this tree without doing anything to the roots into a larger container, to allow for more space for the roots. It looks like they may be wrapped pretty tight, but the plant looks healthy enough, and if it is still growing, waiting till the right time to do a repot is best.

I had a privet that had stopped growing because it was rootbound, and I slip potted it into a larger pot, and now it has new shoots everywhere, just to give you an idea when a repot out of season would be needed.

Yes it does and yes you can