Hi @jayv25585659
Maven archetype is only required whenever you are creating the project from scratch. If you are already migrated to the AEM version 6.5, you need to upgrade the uber-jar, maven dependencies, Jdk-11 ,OSGI and 6.5 service package etc.(Which you already did).
Now to answer your question, Like you also created new maven project structure and want to adapt to it then you need to copy paste the code from old structure to new structure, but this is not recommended, since it is cumbersome and required efforts.
While creating latest maven archetype project structure you can also omit dispatcher configuration by setting propertyincludeDispatcherConfig to n (default is y) - "Includes a dispatcher configuration either for cloud or for AMS/on-premise, depending of the value of aemVersion (can be y or n)."
Reference: https://experienceleague.adobe.com/docs/experience-manager-core-components/using/developing/archetyp...
Hope that helps!
Regards,
Santosh