Have you tried Gripe Water? It’s suitable for babies over 2 months old
You can try doing massages too,
Gaviscon
For us figuring out problem foods and cutting them out of my diet finally helped us (breastfeeding). My little one is allergic to dairy and soy it turns out
You can try changing the formula, gentleaae, enfamil helped a lot
Bio Gaia was recommended, so we’ve just got that, will be trying it