From a positive thinking perspective, it makes perfect sense for PSG to target Barca's young players and PSG is taking advantage of the situation Barca is currently experiencing in order to get big profits to improve its finances.
Meanwhile, from negative thinking, it is impossible for PSG to have interest in young players who do not have experience because this club prefers to bring in experienced or professional players.
On the other hand, Barca will also not let go of Lamine Yamal before getting a better replacement for this young player.
Unless PSG has a new strategy and makes a very big offer to Barca, maybe that could happen but for me it's very unlikely.
Let's look at the previous few seasons when PSG tried to buy several star players who were already very experienced, but what could they provide in the Champions League competition. It's better to buy young players like Lamine Yamal and the coach can slowly make the team much more solid. If they want to be successful in the Champions League, PSG must change their player recruitment patterns and they should try to utilize young players.
If PSG is willing to make a big offer to Lamine Yamal, maybe Barcelona will consider it. Because Barcelona needs large funds to rebuild the team to become stronger. Without money I doubt it can be done and Barcelona usually has academy players who can develop quickly every season and that can be used in the short term.