Is there a way to replace a template using an extension? I realize we can remove/replace a whole view, but we just want to be able to update the template only

just updating the template content on the theme folder?

i want to be able to do it via an extension

so, you might need to extend or override a specific file and then set your template like you would do with old school custom modules but as far as I know there is nothing native from the extensibility to override a template