i feed my girl solid food when she wake up from her nap around 2/3 and 5/6. you can follow the formula chart if he drink lesser just make the amount he drink or you can check with doc how many ml he should drink.
TapFluencer
1x solid
1x snack
180ml 3 hourly during the day and nurse at night.
TapFluencer
I feed milk before and after naps and sleep. Solids after milk.