We are working on upgrading our aem version from 6.3 to 6.5. Because of our internal platform team restriction we are not able to update our dispatcher apache version and we are currently using 2.2.
We are not able to do dispatcher flush, we are getting 200 response when doing the dispatcher flush but the files are not getting removed inside the mentioned path in the dispatcher flush agent.
Please enable dispatcher debug log (set loglevel to 3) and check if the invalidation request is incoming, and how the dispatcher handles this invalidation. See https://docs.adobe.com/content/help/en/experience-manager-dispatcher/using/configuring/dispatcher-co... for details.