As part of hybris, there is not httpd.conf available as part of the hybris software.
So where can we update the below line of code.
LoadModule dtagent_module "C:\Program Files\Dynatrace\Dynatrace 7.1\agent\lib64\dtagent.dll"
That would be for your apache web server front end. If you cannot put a web server agent on your apache web server front end, you can still serve the UEM injection from the hybris tier by enabling User Experience on the Application agent group. Just be aware that the hybris tier will now be receiving all of the UEM data, so there will be some extra workload.