@twin I just looked at your owner’s manual online, and it really doesn’t show a trans dipstick.
Is it possible that there is a dipstick really far down, where you can’t see it? On some of the Honda CVTs you have to reach really far down to get to the dipstick.
The reason I’m asking is because my 2005 Camry owner’s manual also doesn’t show a trans dipstick, yet it’s physically there in real life.
Perhaps you just have a drain plug and a fill plug, like on a stick shift trans. Or perhaps the level is checked with a scanner.
Just throwing possibilities out there.