How much does your baba weigh now?

My 8 month old boy is about 17lbs and I worry he should weigh more as I’ve read this is underweight. He eats 3 good meals really well (meat,veg,fruit,yoghurt etc) and has about 20oz of formula a day, give or take. Since coronavirus and not being able to take him to weigh ins I feel a bit clueless! I know every baby is different and he is deffo on the slimmer side but I see other chubbier babies I wonder if he should have a bit more weight on him? Might start adding butter and cheese to his meals haha 😅💕 Anyone else have any experience or meal ideas? Thanks!