On stock builds, wheels are always a weak point for heavier riders. For a bike that is only 3 months old, I would expect the bike shop to make it right, either by rebuilding the wheel, replacing the wheel with a new one, or giving you a credit towards a better wheel. Once you have broken 3 or more spokes, the whole wheel is suspect.

I have had to deal with wheel issues twice over the years. The first time was over 20 years ago, and on my regular ride, I kept breaking spokes on my back wheel. Bike was only a couple of months old. After replacing several spokes, the bike shop agreed something needed to be done. They rebuilt the entire wheel, replacing all the spokes. That wheel has not given me a problem since. because the bike was still under warranty, they did this free of cost to me.

On my current bike, I ran into problems with the rim, but unfortunately, this happened after several years, and thousands of miles. While I expected to get more than that out of a wheel, the I had to pay the cost of replacing the wheel with a more robust wheel.