Minecraft Bedrock (iOS and all mobile/console versions) do support assets and executable code as well.

They are called "Behavior Packs": https://learn.microsoft.com/en-us/minecraft/creator/document...

Seems like they use JavaScript and this might qualify for the HTML5/JavaScript exception that Apple has. Also it seems like they are a lot less powerful than Roblox scripts, and there isn't an in-game store allowing you to purchase them without using Apple's in-app purchase flow.

For transparency I lead the Minecraft Scripting team.

You can purchase content that runs behavior packs from the store, but it's all through soft currency purchased with per-platform stores.

Link to some of the content: https://www.minecraft.net/en-us/catalog

As for the "not as powerful as Roblox", we're working on it :)

Neat! And you can do those purchases inside the iOS app?

Yup! Soft currency (Minecoins) travel with you with your Microsoft account and can be used on what ever device you sign into (including iOS). You can also purchase more Minecoins in the game its self each platform.