The first one is related to Approvals, which is a feature in Power Automate cloud flows, and not in Desktop flows.
The second one is in fact related to Desktop flows, so it is a valid reference, even though a very limited one. And then it has some sibling pages that cover different types of errors:

So, it might be a good idea to review what's covered in those. But I wouldn't expect it to possibly cover all possible runtime errors, as there's really much more of them than what seems to be documented here.