is there option to write own account plugin for Jolla and try it or the way to patch and fix CalDav and try on Jolla?
Because there is huge difference between apply fix for mer bug that will end up "someday soon" on Jolla, with no option to test and you'll need to set whole mer enviroment to do it so you can test it. And developing might not be the most straight forward and not exactly noobie friendly(some people can code, but they might be not good at devops btw)