I concur with the previous and would like to add: I wish Joplin allowed me to see all my todos from all notebooks (discussed here) and order them according to their due date.
For now, I use Nextcloud tasks. It allows hierarchies (of todos and their subtodos). If I could replicate this feature, I would quit using a separate tasks-app and let Joplin handle even this function in my daily life.
EDIT: Found out that all the upcoming alarms show at the end of the page in Settings in Sync status. Great! Just hope it was in a more accessible place, maybe as the first thing on that very same status page.