I know voter data is available. I'm talking about *polling station* data. When one votes in advance, that doesn't count t/w one's polling station--though it may count t/w a larger advance polling subdivision that encompasses said polling station. To take a case: in the 2021 election, Parkdale-High Park had provision for 158 "regular" polling subdivisions, 35 "400-polls" (typically apartments/condos), and 16 advance polls + special balloting. Voting in advance goes into those 16 advance polls, which are like "megapolls" which don't offer the statistical granularity of the e-day polls.
Fortunately, Elections Canada still goes about things in an old-fashioned paper-ballot/hand-count way w/an ample number of polling subdivisions--but a lot of jurisdictions (including Ontario) have adopted electronic balloting and a "one polling location = one poll" formula, which dumbs down the statistical data *a lot*. Or if you want an example of before and after electronic balloting was adopted, take a look at Alberta's polling maps for the most recent election, vs those for preceding elections
If you think the new version--where a riding like, say, Calgary-Beddington is now covered by 9 e-day polling subdivisions where there were something like 70 before--is more "statistically satisfying", you're out of your freaking head.