If you use Blocks from Grigora Blocks library, you’ll see those settings in Right Sidebar. But if you’re looking for those settings in WordPress Core Blocks, it wont be available there. For Custom CSS, yes, you are correct, adding Custom HTML Code is only the way to do it right now. The new Full Site Editing is missing the options to add custom CSS. Otherwise, you can take help of plugins like “Code Snippets” to add custom CSS globally.