All in pockets; from L-R
Spare tube, pump, CO2 inflator + spare cart, multi-tool, tyre levers, tubeless repair kit + emergency £10
Waterproof
Phone + Food. 1x Clif bar + 1x Clif blox per hour in the saddle unless it’s a sub 2-hour ride; in which case I don’t bother
If it’s hot and sunny; I spread things out a bit more and leave the waterproof; usually phone + tube into middle pocket; and the right being food only.
I may be over doing this. :D