Hello there!
I have not much time today, but this ist my short answer!
It ist absoluty normal for this Intel-Gernations.
Example given:
My MacBook Air has a base ghz of 1,2 ghz (i7 10th gen) an can boost up to 3,8 ghz. This ist way to much for the little cooling system. If your doin a stupid long term Benchmark (your actual workload will always be different from an syntetical benchmark) yes all modern gaming laptop will try to boost up as high as they can. So they will end at around 2,x ghz and with 100 Degrees Celsius.
My MacBook is running at 100 for 1,5 years no Problem, this chips can handle that easily!
To the Frame.work laptop:
Yes it will thermal Trottle during styptic benchmarks, and yes it will absoluty survive the 100 Degrees, these intel chips are build like that.
The real question for me is, how the do in normal task (normal task for an ultrabook).
But a have do agree, if you doin maybe hardcore blender stuff or video Editing yes than the frame.work laptop will get also hot. But this is the way these intel chips work. Go full Power, Lern to get hot, lower the power until, temperature and power match. Depends on the Cooling the point will be by 1,8 ghz or higher!
Did this help? Greetings 