You don't need to be a Swede to get bankid, but you do need a national registration number which you can apply for if you intend to live in Sweden for something

You don't need to be a Swede to get bankid, but you do need a national registration number which you can apply for if you intend to live in Sweden for something like a year or more. In other words, if you live in Sweden you'll likely have bankid. As a tourist or seasonal worker, not so much.