Even though PSG was actually the favorite team in that match, Lyon was very good. Look at the statistics of this match, even though PSG have high possession, Lyon managed to create a lot of shots on goal. Lyon managed to force PSG to a draw in that match, but the result did not affect PSG too much, who still lead the standings with an 11-point advantage. Losing some players due to injury or covid issues shouldn't be a proper reason for PSG's failure in the match because I think PSG were just unlucky to score.