Polls during an automated webinar will show up at the time you set during the edit process. 

See: https://support.easywebinar.com/en/articles/3558577-setting-up-polls

Timers for polls as with offers as well are reliant upon the timers for your webinar video being correct. 

If it seems your polls are not deploying correctly please check your webinar timers.
*See image below to set your webinar video timer correctly: