From what I can tell, it seems to be an issue if you turn on the system theme setting. I was able to get my status bar back by turning off that setting.
I was about to say it’s a weird light mode glitch because time is there in dark, but actually I can see the top bar in light too.
Which version are you on? App Store or TestFlight? I’m on the beta and it’s correct for me so maybe it was one of the bugs fixed between submission to the App Store and approval and the update is going to be pushed soon to fix.