I'm loading the day.js module in the function node setup tab, and it works fine for basic date/time functions, however for more advanced functions, it requires additional plugins to be loaded as per the readme - Loading plugin in NodeJS · Day.js
The dayjs plugins have been installed by default when dayjs is added, and are at /home/pi/.node-red/externalModules/node_modules/dayjs/plugin
but adding the plugin as per the screenshot above results in a node-RED crash.
Can these supplementary modules also be added in the function node setup by adding the path somehow?