The border of Finland is the border of the countries of the Schengen agreement, which includes Switzerland. But there is a rule: you should request a visa of the country where people are going. Of course, a Schengen visa allows you to visit any of the Schengen countries, but the general situation is as follows: if a Finnish visa is required - it is necessary to use it for trips to Finland.

If a citizen has received a Finnish visa, and then traveled to other countries of the Schengen Union (even through Finland), then the next time, at least for a while, he will be set a certain period of quarantine. During this period, he will not be able to get a visa, either multiple, or one-time. This will be a kind of "punishment" for the fact that during the previous submission of documents for a visa, he provided incorrect information.

We recommend to cancel the Finnish visa, since the documents were originally drawn up for visiting Finland. After cancellation, you can apply for a Swiss visa if the deadline allows.