I use Todoist as the central tool for all my reminders etc. Because Agenda only works with Apple Reminders, I’ve created a script that syncs any new reminders to todoist, and syncs back any changes e.g. changing name, complete etc. I run it in a cron on my laptop. Sharing here if anyone is interested: https://github.com/DaveHarrington/reminder-to-todoist
Thanks for sharing!