They actually do exist and have pretty much forever, but I noticed when I tested, that even though Guides was enabled in the View menu, I had to click again to make them active. Little bug maybe? But for any video preset, title safe and video guides are available. Not exactly the same as in AE. No labels on them, but if you see that Extras in the View menu is enabled, and Show> Guides is also enabled, try clicking again. Canvas Guides will also show/hide the video guides.