According to Intel, the Intel HD Graphics 620 theoretically supports up to three monitors and with one certainly 4096x2160 at 60Hz. The dual-core processor of the previous processor family with Intel Iris 540 can at least display one monitor with 3440x1440 (60Hz) and one with 2560x1600 (60Hz). So for office applications, that's certainly enough. I hope this answer is enough for you.
Yes ? No ? What do you want to hear ?
PCs are made to run.
And what do you mean by continuous operation ? 16h/day ? 24/7/365 ?
PS: Some streamers don't switch off their boxes for weeks and everything works for them.
PPS: There are systems that HAVE to run for years or shut down.