One thing that might help is keeping a food diary. This lets you look at what he’s eating over a week rather than obecindicidual meal. It’s perfectly normal for a baby if one to refuse a meal. This is usually for one of two reason, he’s either not hungry or more likely, he knows something easier will come his way if he refuses the first option.
He only needs 10 floz a day. If you are using bottles to get him to sleep, I’d just give one before his afternoon nap and one before bed and not at any other time.
I’d also stop spoon feeding him and giving pouches, some babies can be incredibly lazy but he will feed himself once he figures out you’re not going to do it for him, he might shout a bit, but stay calm and eat your own meal or just benignly ignore him and do the washing up.
I give him breakfast first thing. If he’s dropping food, try putting him in a long sleeved bib and a cheap shower curtain (or a dog) beneath him.
Lots of things to try him with, a banana. They split naturally into segments if you peal them from the top to make them easier for little hands. All of us like blueberry pancakes at the weekend. Sausage and beans, just cut the sausage lengthways. Smooth nut butter on toast. Scrambled egg, eggy bread with honey cinnamon and berries, porridge fingers, weetabix with milk and banana or berries. Chopped fruit.
If you are worried about spending time cooking then it being wasted, try to make things you’ll both enjoy, like the blueberry pancakes. You don’t have to eat the same as the baby for all meals but if you cook for yourself and give the baby some of that, it doesn’t feel like such a waste if they refuse it IYGWIM.
What sorts of things does he have for snacks too OP? Try him with a cup of milk and cubes if cheese and halved grapes, hummus and beg sticks, cream cheese and baby bread sticks. Savoury muffins freeze well and mine loved Cheese straws with a bit of fruit. They will keep for a couple of weeks in an airtight container but mine always scoffed them pretty quickly. Have you tried him with a homemade lolly too?
Is he drinking much water? BM gives them a drink as well as food and I’m just wondering if he’s drinking so much milk because he’s thirsty?