I am pretty sure I have ADHD and I still manage to meal prep.
Even if you cant, you can literally just have a backup plan like mine, for when I forget to cook I have some frozen chicken strips, potato wedges, and green beans, throw it all on a sheet pan and into the convection oven for 20-25 mins, boom you have a decent meal, bit more pricey than doing it from scratch, but it’s quick and low effort