It's worse than that. Tesla is refusing to recognize the mechanics union at all. The Swedish mechanics union has many members at Tesla, and have asked to negotiate, and Tesla is flat out refusing to sign a deal to bring their working standards up to national standards. This would be illegal in the US under the NLRA.

Union collective agreements are so important in Sweden that they literally are our labor laws. Sweden does not have a minimum wage or overtime pay at all in the national law. Those are always regulated in the collective agreement. Tesla is refusing to accept any sort of minimum wage, overtime pay, etc for thair employees. They are trying to do business in Sweden without playing by basic labor rules, and they are being shunned by all of Sweden for it. They will end up like Toys R Us in 1995.

Source: I am a Swedish white-collar union member