I’m not familiar with Sweden, but this is how it works in Finland. The data are not published online, but can be queried by phone or in person from the tax offi

I’m not familiar with Sweden, but this is how it works in Finland. The data are not published online, but can be queried by phone or in person from the tax office. National newspapers publish lists of the top earners each year when the data are published; here is one example (in Finnish), including everyone with income over €100,000: https://www.iltalehti.fi/verokone https://www.iltalehti.fi/verokone