I was thinking since the only Charizards shown in the Sword base game and the only ones that Gigantamax are Leon’s Charizard and the gift Charmander you find after beating Leon. Anyway I was just curious and since you can’t find Charmander, Charmeleon or Charizard in dens or just find normal Charmander, Charmeleon or Charizard in the wild, I was wondering if the ones brought into the game will Gigantamax instead of Dynamaxing.
A Charizard imported into SwSh will not inherently have the Gigantamax Factor, meaning it will Dynamax if no changes are made. However, if you've purchased the DLC, the Isle of Armor introduces an item called Max Soup that allows you to Gigantamax any Pokemon with the ability to do so. This means that you can feed your Charizard Max Soup and allow it to Gigantamax.