Have you looked into a vibrating baby seat? Sometimes that really helps when babies have tummy challenges. My husbands parents had to take him on car rides so he would sleep as he was a colic baby too. It’s the vibration that helps. I actually have taken horses that were colicing for rides in the trailer which often helped them a lot.

You can also hold a thin pillow on the baby’s back and gently use one of those electric messages on the pillow moving it up and down where the baby’s tummy is located. That can sooth and help reduce gas pressure.