Thanks @Kevin_N for sharing the workaround here, looking at the code here, 3dsmax.py file looks for the plugin.UserSettings.ini file and writes some lines to it. You can add the line to the DeadlineRepository10\plugins\3dsmax\3dsmax.py on line #2117
[MaxInstallDirectory]\Plugins
We have seen that Deadline doesn’t load the 3ds Max 2022.3 and later plugins stored in the legacy standard path “C:\Program Files\Autodesk\3ds Max 2022\Plugins”. The workaround we’ve used is to use the new 3dsmax 2022 environment variables and set ADSK_3DSMAX_PLUGINS_ADDON_DIR to C:\Program Files\Autodesk\3ds Max 2022\Plugins.