I have added Apple Notes to the list. Unfortunately, it looks like your votes have now disappeared - it seems you can’t edit a poll after it’s been created.
If you don’t mind, could you add your votes again?
On a separate note, I’d be interested to understand what use case would you use a Calendar integration for?
YouTube, Apple notes, iCloud, Safari bookmarks. I tried to vote but the ones that I select became green and nothing happened, “vote now” is greyed out and it doesn’t count me among the voters!