In my opinion you should not use this for your (valuable) data. Did you find users with similar setup combinations? Users with ECC memory?
On a dutch
site i found this: "ECC (alleen Xeon en Core i3 8th gen)". Meaning Xeon and 8th gen. This can be just be incomplete data on this site.
Looks like information which was correct at the time (8th gen. Coffee Lake) and was not updated for Coffee Lake Refresh (9th gen.).
This C246 motherboard is apparently intended mid-way between "corporate desktop" (or "low-end workstation", meaning "desktop with ECC") and "industrial", and works with ECC as good as Fujitsu/Kontron has implemented it—which I would expect is "spot on" because their typical enterprise customers would likely complain high and loud if it weren't.
Except for the lack of a BMC, this board is a good as one can find for server duty. Given that 9th gen. was the last with ECC support in Core i3 CPUs (skipping the "Xeon tax"), and given the state of the market for C246 boards right now (either out of stock or overpriced), I can't blame
@nasBuilder for going with what is essentially the last C246 board that can be bought new for less than 200% of its introductory price.
It looks though that I can't attach Noctua U9S to it which is a bumer...
Why couldn't you? The board appears to have standard holes for LGA1151 coolers, as one would expect.