You might like Builder.io (https://www.builder.io/m/developers https://www.builder.io/m/developers) - they let you embed drag-n-drop powered sections within you

You might like Builder.io (https://www.builder.io/m/developers https://www.builder.io/m/developers) - they let you embed drag-n-drop powered sections within your regular page markup, and it looks like they support most frameworks like svelte.