No interest in eating

I feel at a loss. My eldest is 8 years old. When I BLW him at 6 months he took to it like a duck to water. Ate everything and anything. To this day he is the least pickiest eater and I’m fully aware how lucky I am that he has such a great relationship with food. Now I know the whole food under one is just for fun and nutritionally baby still gets their main nutrients from breast milk or formula. I also know at 6 months and further baby is most likely to just play with food than eat it but my youngest, (6 months old) will just not even try. He gags at everything even throwing up, won’t do anything on a spoon and has no interest in finger foods. I’m of course happy to wait. I keep thinking maybe he’s just not ready yet but he has surpassed all his milestones. He has lost his tongue thrust reflex, he sits up unassisted, he currently actively reaches and puts things into his mouth, he chews, he watches intently and grabs food but after all of this he gags at the taste, spits it out and stares at us all eating like we’ve just tried to poison him. He’ll happily much on the spoon and the plate but won’t want anything on it 🤦🏻‍♀️ The only thing he actively eats/wants is the organix sweetcorn rings. He and my eldest are the exact opposites. My eldest loved calpol, his dummy, food etc. My youngest has never taken to a dummy, refuses a bottle, throws up calpol and nurofen, spat out his rotavirus vaccine etc…The only thing he’s ever been okay with in his mouth is my breast and a teething toy. I genuinely feel like he’s going to be my picky eater. What do I do? Do I just keep giving food and hope that one day he decides and figures out he likes food? Or do I stop for now and try again nearer 7 months. I also want to add he has severe CMPA and is EBF on a strict dairy free diet so I have to be really careful with what I feed him anyway.