I came here looking for just this feature so am so glad it has been implemented!
I share the feedback of @hellekin and @Thomas_Rother about the corporate links. If these could be made optional, that would be great. Many people use Discourse because they believe in digital sovereignty so having these logos appear is not appropriate.
More important is discoverability of the feature. It’s buried in the user preferences but would be so welcome directly on the calendar UI navigation. Click “Upcoming events” and then see a link to subscribe would be gold. 