You can use the following attributes and methods on the ModelAdmin class to alter the base URL path used to represent your model in Wagtail’s admin area.
ModelAdmin.base_url_pathExpected value: A string.
Set this attribute to a string value to override the default base URL path used for the model to admin/{base_url_path}. If not set, the base URL path will be admin/{app_label}/{model_name}.
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    https://docs.wagtail.org/en/stable/reference/contrib/modeladmin/base_url.html