Paris SG, with its excellent squad, is the natural favorite every year, and that's perfectly normal. The French league isn't particularly challenging for them. There are some strong teams, including Marseille, Lille, and Monaco, but it's not difficult to beat them. This hasn't been a difficult situation for Paris SG at all. Lille has taken a trophy from them in previous years, but PSG has been the only strong team since then.
The French League will be challenging for PSG only when several teams in this league can create a team equal to PSG. Currently, PSG is one of the strongest teams in the French League and the richest club, we can say that PSG is the only one, in this case, this team will take all kinds of steps to maintain their continuous success. Just as they were the best club in the French League before, they are still the best club in the French League and this will not change in the next few years. On the one hand, things are easy for PSG because if PSG were a team in the English Premier League or La Liga, they would have to make a separate plan to do well in the league competition, but they do not have to do so in the French League. They start the season only to do well in the Champions League and their main plan is for the Champions League.