Thanks for your response, Matt! I did test a ton of different parameters with the client. I was confident that it wouldn’t be that Evolve wasn’t working, but rather a communication problem between the SCORM and Docebo.
SOLUTION: I troubleshooted with the client, and it turned out to be that the SCORM criteria needs to be passed/incomplete under advanced tracking (rather than the default, which is complete/incomplete). We tested and the bookmarking finally works as expected. Their admin told me the other criteria pairings do not work in Docebo. See screenshot of proper settings.
Hopefully this helps others who are pulling their hair out!