When you haven’t accounted for display as you go I usually I find it best to disable everything and then start enabling the parts you want.
In your graph hit ctrl+a to select everything on canvas. Then right click on the workspace background and select ‘disable geometry preview’ (or some similar language). There will no longer be ANY geometry preview.
If you want partial display you can add a new code block that accepts the geometry you want to display, or enable it on a single node by right clicking it.