I know this is a huge request but litematica? It's a client-side schematic mod , that's super helpful for big scale builds, that has the benefit of a full material list for the project and so on.
The mod also requires MaliLib to work.
The 1.21 versions are currently being ported by someone new and would be downloaded from here .
Again I know this is kinda a huge mod to ask for, but it's such an incredible tool for builders and means we wouldn't have to jump in and out of creative all the time or need 50 reference photos to build something tested out in creative :)
Thanks for the (however brief) consideration!