And yes there is a level of stereotyping going on here.
What the hell are you talking about? Belgium is a small nation.
I suspect many people consider the Netherlands to be one of the great footballing nations - not always at the top, but regularly right up there and sometimes with a world beating golden generation.
Yet the Netherlands isn't much larger than Belgium in terms of population. So why are we not surprised when the Netherlands ranks really highly and ends up at the sharp end of tournaments, but we are surprised when Belgium does so.
The Netherlands is about 70% larger than Belgium in population terms. Even so, if you didn't know about their footballing history, it might be surprising to find out they were ranked at number one (only once for a short period of time, as it happens).
And yes, actually, in the context of their size, it is surprising that they have such a good record in Football.
And didn't you notice they won every one of their qualifying games for Euro 2020, with a record better than any other team.
If qualifying performance were an indicator of subsequent brilliance, England would have a whole heap of silverware.