I don't do well with controlling several different saucepans and processes at the same time (though the benefits people refused to accept my claim because I didn't get a doctor to write that down for them - I didn't anticipate that because they never explained it to me and the doctor has never seen me cook so his opinion wouldn't have been of any logical consequence......in those days I was still silly enough to think that benefits people might be actively helpful and could be influenced by logic and reason). Anyway, I'd do OK with those multiple saucepans if the cookery thing was scientific, because then I'd know all the required times and be able to calculate different start times for each saucepan so they'd all complete at the same time, but cookery isn't scientific, all the times are nominal and in practice it all has to be done by inspection, and I can't multi-task to that degree.
But I've got a few fairly complex recipes I've done many times that are pretty intricate, and they work because I know all the required times pretty accurately and I'm used to the procedure - as long as nothing gets changed. The saucepans have to be the same every time, the cooker has to be the one I'm used to, and the ingredients have to be fairly well standardised. So yes, executive function problems give me trouble in the kitchen and I find myself using repetitive behaviour to cope with it, which works pretty well as long as nobody who eats my meals objects to the results being rather samey. Objecting to samey is a luxury I can't afford, so if they insist on variety then they can go eat somewhere else.