Kindly take a look at the following note https://experienceleague.adobe.com/en/docs/journey-optimizer/using/content-management/personalization/lookup-aep-data  Dataset lookup is currently not supported in fragments.  

You can use the following expression to filter those profiles that have 'asd.com' as the email domain valuecontainIgnoreCase(serializeList(#{ExperiencePlatform.ProfileFieldGroup.profile.identityMap.entry('email').id}, "|", true),'@asd.com') 

Yes, that's feasible by specifying the attribute as a variablehttps://experienceleague.adobe.com/en/docs/journey-optimizer/using/configuration/configure-journeys/action-journeys/about-custom-action-configuration 

Following are the enum values that you will find against the "_experience.customerJourneyManagement.messageDeliveryfeedback.feedbackStatus" attribute in message feedback event schema  

You can take a look at the note and the tutorial in this documentation https://experienceleague.adobe.com/en/docs/journey-optimizer/using/configuration/configure-journeys/events-journeys/about-events https://experienceleague.adobe.com/en/docs/journey-optimizer/using/configuration/configure-journeys/...

There is a runtime rendering error, kindly log a support ticket for this

can you query ajo_message_feedback_event_dataset dataset filtering on _experience.customerJourneyManagement.messageExecution.campaignID column to see if there is any error reported ?

Unitary journey should have profiles entering in, provided they meet the event criteria, have the identity namespace value and if the data is being streamed in https://experienceleague.adobe.com/en/docs/journey-optimizer/using/configuration/configure-journeys/events-journeys/about-events Hopefully, ...

Can you share what error you get when you directly use{%= addMonths(profile._deloittellpcanada.abnMemberDetails.tsExpect_date, 1) %} ? This should ideally work as it's a datetime from the below example    

It is generally recommended not to share IP addresses between non prod and prod sandboxes while creating the IP pools. Therefore it is better to create separate ip pool for the respective sandbox. Note - IP pool configuration is common to all environments