Here is Steinbauer's module for the XC90. It is not the type that increases rail fuel pressure or boost pressure but does extend the injection duration, and therefore quantity of fuel. I suspect that driven hard, it increases exhaust has temperature compared to a standard engine. Probably with no ill effect to the engine as long as the duration of full power operation is short. It is probably the way that Polestar's new power boost works, although it might also increase boost pressure and only for a short time-limited duration.
https://www.steinbauer.cc/gb/product...73kw__5ty/cuS/
There is no link between me and the company and I have no personal experience of their products but do know that they are very popular and possibly market leaders in the commercial vehicle, agricultural and car tuning sector in the UK and abroad.