Am 6 months post I and have realized recently that I am able to eat more than I have in the past

For example I was only able to eat half of a deli flat before and I'd get that full feeling but now I am able to eat both pieces of deli flat is that normal?

There is no "normal" we all have different size stomachs before the surgery.. So it stands to reason we will have different sizes after..

As to being able to eat more. Yes at about the six month mark the stomach is fully healed (yes it takes months) and relaxes a bit.. So capacity Is slightly increased. As always make smart choices and don't over eat until miserable.