can a 2018 Buick regal tour x wagon be easily raised up a little
Robert , if you mean lifted like people do Jeeps and trucks I would say you are asking for trouble.
Yes. Your car is the same as an Opel Insignia Sports Tourer.
You might be able to fit slightly taller tires, but that’s about it. Not worth the trouble or $, IMO.
If the kit suggested by TXdealer is available for your Buick, chances are it will void part, if not all, your warranty. Check with dealer service.