Do iPhones count?

I've taken multi-hour continuous exposures on my iPhone + iPad (both "normal" and "light trail" variants.)

By the looks of [0], you can do at least 90 seconds on the Olympus E-M5 MK II - which is what I have and I'll see if it can do 10 minutes tonight.

[0] https://www.olympuspassion.com/2019/08/26/long-exposures-wit...