I only have Adobe Analytics, but there may be some valuable information in some of the other community forums as well:
https://experienceleaguecommunities.adobe.com/t5/adobe-audience-manager/ct-p/adobe-audience-manager-community
https://experienceleaguecommunities.adobe.com/t5/adobe-campaign-standard/ct-p/adobe-campaign-standard-community
https://experienceleaguecommunities.adobe.com/t5/adobe-target/ct-p/adobe-target-community
There may also be some user group sessions that covered cross-platform connectivity (I know this is something a lot of user groups would like to add to our sessions), https://analytics-augs.adobe.com/ (while not too active there is a "better together" user group in the Global area https://analytics-augs.adobe.com/better-together-user-group-chapter-experience-cloud/ I would try contacting those leaders in the meantime to see if they have any plans for covering some of these product lines... but there may be some coverage in the recorded sessions over the last few years: https://www.youtube.com/channel/UCQOHnCs7KZgsuFHVzwboQuA
I know that Target questions come up frequently in the Adobe Champions Office Hours, so hopefully there is some info there... there is an office hours meeting each month, so that could be a great way to get some specific questions answered (assuming the champs covering the meeting have experience with the specific tools)
I also found some past questions in the forum that might help you out:
https://experienceleaguecommunities.adobe.com/t5/adobe-audience-manager-questions/integrate-adobe-analytics-with-adobe-audience-manager/td-p/245896
https://experienceleaguecommunities.adobe.com/t5/adobe-campaign-standard/adobe-campaign-and-analytics-integration/m-p/200691
I know this isn't really a direct answer, but maybe this can help get you started.