It is possible to sync tentative and final options from Doodle to your calendar. Here is how to do it.
On your poll's page, switch to the Calendar view
Scroll to the bottom. You should see the Calendars drop-down and a message that will show you whether the options are synced to your calendar.
Note: if you have already voted in the poll, you won't see the message!
By default, only final options are synced. You can click on "Final options" and select the checkbox with the label "Sync selected options too".
After you vote in the poll, you should get the events (tentative and final options) synced to your calendar too. This would also work if you have connected your calendar via ICS, as explained HERE.