Adding OpenApiAutoConfiguration to automatically provide instance of the OpenApiCustomizer (with dynamicBasePath set to true). This instance is being injected into every discovered OpenApiFeature bean (in case it has no customizer specified) by OpenApiFeatureBeanPostProcessor. For typical Spring Boot project, this is what you may need most of the time.
In case there is an instance of the OpenApiCustomizer bean, it is going to be used for injection. If OpenApiFeature bean already has a customizer, the auto-cofiguration has no effect.