For my 5kg ish cat that's two pouches plus about 30g biscuits per day. We give him the pouches at about 8.30am and 4.30pm, and the biscuits at lunchtime and evening if he asks.
When we didn't measure the biscuits and just put them out as and when, he put masses of weight on so no we're careful to measure. And if he's given any leftovers (e.g. bits off a roast chicken when I strip it) then no biscuits at all.
I always had dry food available to mine (tbh whatever's on offer) and they graze throughout the day and night. They have 1 85g wet pouch between them in the morning and an 85g pouch each in the evening. Sometimes they get some treat sticks of an evening but not often. They don't gorge on fresh biscuits so I don't think they're starving. They're both a good weight for their size (small female moggies).
One of them was a stray and will try to take anything you're eating given half a chance but I think that's habit due to her earlier life (one I had PTS in July was a stray and exactly the same). She's also still growing and spends half her life galloping around like a mad thing so is probably hungrier than the other one. They're primarily house cats who go out a couple of times a day so not roaming a lot and I would think this makes a difference to how much they eat
Depends what the food is... Two of the cats in our house are fed felix as good as it looks as and when they ask for it and constantly scavenging and begging, the other two are fed natures menu and applaws (far higher meat content) and are happy with twice a day!
One medium sized girl, one largish boy, indoors only cats. They have half a pouch of Felix AGAIL in the mornings between them & a pouch in the evenings between them, and Royal Canin Indoor Cat dry ad lib (with the occasional serving of the anti-hairball for variety). Either a single Webbox Stick or a single portion of Lik e lix between them when I get in from work.
They are possibly a tiny bit overweight but not much, though I think that's more saggy tummies due to not going out rather than fat. And they do get a few too many Dreamies!