No, they are not. That would be highly atypical.
As for the article, less likely to end up with Swedes than their own women or other immigrant women, yes! How the hell does that make immigrants incel?
Basically, immigrant populations in northern Europe tend to have equal access both to European women and their own women. North European males however tend to have access only to women of their own nationality. This is stretching it, but there sure is such a pattern. In other words, every time an immigrant man gets a Swedish woman, a Swedish man is derived of a female mate.