No — there is no reliable public source currently confirming that Felix Rosenqvist is left-handed.

Felix Rosenqvist is a Swedish professional racing driver who competes in the IndyCar Series. He began his racing career in karting, where he achieved significant success before progressing to open-wheel racing.

Throughout his career, Rosenqvist has competed in various prestigious series, including Formula E, Super Formula, and the Blancpain GT Series, earning victories and podium finishes in each. He is known for his versatility and speed across different racing disciplines.

In the IndyCar Series, Rosenqvist has driven for prominent teams such as Chip Ganassi Racing and Arrow McLaren SP, consistently demonstrating his skill and competitiveness on oval, road, and street courses. He is considered one of the leading talents from Sweden in international motorsports.

His achievements include winning the Macau Grand Prix twice, the European Formula 3 Championship, and the Masters of Formula 3. Rosenqvist continues to be a prominent figure in North American open-wheel racing.