It is not possible to see who has voted, only the numbers of votes are shown and that depend on the options selected, who created the poll and the options seleected.
Here's a poll I created and voted in as Admin viewed before I login:
Here I have logged in as a test user:
Here I have logged in as a Admin:
And these are the settings for that poll:
Volunteer Helper - but recommending that users move off the platform!
Once the admin for GregHelp now deleted.