HTML/CSS input in Dev Mode

Could you please make it possible the code shown in Dev Mode to be available for editing? There are some HTML features available in HTML, which are not available in Figma. I don’t like that Figma containers are set to ‘flex’. The normal HTML flow goes with default block containers.

I’m both a designer and a front-ender. I have a ready HTML/CSS/React site functioning and I have decided to remake it in Figma. Guess what, I can’t! Figma is very limited. I can’t use percentage, I can’t use z-index, I can’t use grid…