Opa existe sim... Se você olhar a struct do recurso completa vai ver as flags:

	// Ommmit<Route Type>Route are flags that omit the generation of the specific route from the router
	OmitCreateRoute        bool `json:"omit_create_route"`
	OmitRetrieveRoute      bool `json:"omit_retrieve_route"`
	OmitUpdateRoute        bool `json:"omit_update_route"`
	OmitPartialUpdateRoute bool `json:"omit_partial_update_route"`
	OmitDeleteRoute        bool `json:"omit_delete_route"`
	OmitSearchRoute        bool `json:"omit_search_route"`
	OmitHeadRoutes         bool `json:"omit_head_routes"`

(https://github.com/franciscoescher/gosimplerest/blob/main/resource/resource.go)

Ele adiciona todas as rotas por padrão e omite as que você escolher.