I just wish DMS supported real-time data synchronization for utf8mb4 on MySQL... That really destroyed my workflow with errors when I moved to utf8mb4 (requirement) and then had to stop using DMS altogether. It’s pretty much the only thing I used from that services.
There are a number of unfortunate shortcomings depending on what your DMS source/target are. Another that bit us was (the lack of) support for JSON types in MySQL sources.
Was there no option to add a transformation to your DMS routine to handle that?