Yeah I can confirm that it will only show the time on its own separate page- not on the same page as your speed/average speed etc. It seems a bit remiss and I did think it was a bit of an oversight after I bought it to be honest.
Also I don’t know if you need to use it on a turbo trainer but it won’t show cadence/heart rate on the same page either which I find annoying as it’s tricky to keep scrolling through to cross-check these in the middle of an interval session. I presume the other “bigger” garmin so this but ive never owned one.
In retrospect I bought the wrong one really but at the time I was less serious about cycling and only wanted to know my speed and average speed etc which it does just fine.