Yeah, a large aspect of their duties are protecting the pope but the Swiss guard are all trained by the Swiss army before going to Vatican City.
And while they do chiefly rely on soft power almost exclusively- and by no means are they capable of engaging in actual war fare- they are not incapable of smaller actions.
There’s an awful lot of shadows at the highest echelons of the catholic state (and a shit load of money and loot, too.)