There are plenty of regional accents, some are obviously different, like all the Quebec French, and the Newfies, but some are super sublte. Mostly, we sound like the standard flat "newscaster" non-accent of the western US, with more rounded vowels and a fair bit of English spelling.
There is a midwest-Ontario farmer accent that is disappearing, but is super neat. "-ly" at the end of words becomes "-leh," and there's a bit of the cliche grizzled prospector in there too, b'Gawrd. If anyone has seen the show Letterkenney, the writers are from that region and the "-How'r y'now? - Nah sah bad." exchange is absolutely a real thing.
The "ou" in out, about, house changes depending on where you are. Never heard "aboot" except from people trying to flex on Canada, and I'd like to take a moment to say, we forgive you, eh, but enuff's enuff. Around here it's mostly abow-ut, with an ah-ow dipthong leading into a quick uh before the t. That's the way most of us will say it if we're thinking about it, anyway. Get a ways into the countryside, and Northern Ontario, you'll hear stuff like, "It's aboat time to take that roast oat of the oven, or it'll burn the hoase down." Go ahead, make fun of us, eastern US seaboard, then take one of your "toars" up here and listen to us say too-er. Ya hosers. The ah sound in talking tends to get sharpened to a different ah, like in tax. There are probably dozens more little weirdnesses that I haven't noticed.