You're a bit behind. That API has been out for almost a year now:
https://www.minecraft.net/en-us/article/scripting-api-now-pu...
https://minecraft.gamepedia.com/Bedrock_Edition_beta_scripti...
https://www.minecraft.net/en-us/article/scripting-api-now-pu...
https://minecraft.gamepedia.com/Bedrock_Edition_beta_scripti...
It’s neat, but even by previous FAQ response standards it’s horribly weak. It appears like little more than an ability to make scripts of existing vanilla commands. You can’t make/register blocks, fluids, modify terrain gen, or even trigger individual events. As a framework it isn’t useful for content creators.