Block editor html code adds extra white space

I hope I explain this correctly! When I add a block for html code within the block editor (because I am adding anchors to be able to create a manual table of contents, and have links jump further down the page), the result on the actual page is a ton of extra white space above the heading - obviously because it's counting the block as padding of some sort. If there any way to make html code within block editor invisible on the actual page? (The code itself is already invisible, but trying to remove the extra white space it then creates). This doesn't happen on the classic editor, only when using block editor.

Not sure if there's a solution, but would love it if someone could help :)

Thanks! Xx