Asynchronous programming in FDK

I have a large set of ExtendScript scripts that I run on a large structured FrameMaker book. The scripts run fine with FrameMaker 2019, but some of the processing is incomplete in FrameMaker 2022 (17.0.3; I don't have client authorization to try 17.0.5 yet). For example, all cross-references are not resolved, and all custom master pages are not applied. It seems that FrameMaker doesn't "catch up" with all of the tasks that the scripts are doing. I tried putting some sleep methods in the script to allow FrameMaker to recompose pages, etc., but I don't think ExtendScript is asynchronous.

Is it possible to do asynchronous programming with the FDK? Thank you.