How to display a node edit form in custom URL
Create a new menu item in a custom module
# mymodule.routing.yml

mymodule.banner_settings_form:
  path: /admin/config/system/banner-settings/{node}
  defaults:
    _entity_form: node.edit
    # Copy UUID from exported default content.
    node: 05d6a9e5-6e78-42bb-b3fe-b9a6344f4022
  requirements:
    _entity_access: node.update
    # Custom permission check.
    _permission: 'administer site banner configuration'
  options:
    _admin_route: true
    _node_operation_route: true
    parameters:
      node:
        type: 'entity:node'
        # Part of jsonapi module.
        converter: paramconverter.jsonapi.entity_uuid


Visiting /admin/config/system/banner-settings would take the default UUID value from the route and renders the form.
P.S: After saving the form it would redirect back to node/[nid] and this can be avoided by passing ?destination=&lt;your path&gt; in the link.