Unfortunately the Synology GUI doesn't make the run command options easy to find out.. it appears to be non-trivial. (How to show the run command of a docker container - Stack Overflow).
I assume the GUI just takes whatever default docker run command comes with the image (also not easy to find in the image tarball), but I'm looking into seeing if I can force the docker run options using a docker compose yml instead (https://forum.synology.com/enu/viewtopic.php?t=143362)
Sorry if any of this is idiotic, I'm pretty new to this space.