Referencing what’s written here: Email to Inbox - Calendar appointment markup does not work - #2 by Shida
Acknowledged, right now the problem is that Dynalist’s app is actually responsible for initiating the Calendar sync. That means any new items received from email to Dynalist, or using the API, does not get synced to Google Calendar unfortunately.
I agree it’s a problem, but fixing it would need a pretty big change to the way things work.
I’ll track this issue internally, but I believe it’s unlikely we can fix it soon. Sorry about that.