I watched season 1 of this on BBC Four in 2018. I didn’t know season 2 had been released, and both are on Prime! It’s French with subtitles, and I highly recommend it. The Prime synopsis isn’t great, Wikipedia is better:
In the near future, the first manned space mission to Mars, Ulysses 1, is a European mission funded by the European Space Agency (ESA) and William Meyer, a billionaire Swiss philanthropist. The crew is made up of the best astronauts and European scientists, including French, Italians and Germans. Jeanne Renoir, the crew psychologist, monitors the mental health of the crew. After ten months travelling through space, a few hours from starting the landing procedure, the astronauts learn from William Meyer that they will not be the first astronauts to land on Mars. They were overtaken by a US mission with a faster vessel funded by NASA and a multi-national computer company. The only sign of life from the American mission is an alarming video and the European mission decides to investigate. On Mars the European astronauts do not find the Americans but a Russian, Vladimir Komarov, who died aboard the Soyuz 1 spacecraft in 1967.