In fact, Ramos current status is without a club because PSG also did not extend his contract. With the contract not renewed, Ramos can be owned by any club at this moment for free, but I wonder why you still think Ramos is still part of the PSG squad. Also, regarding that match it seems that PSG also only played second-tier players, so it seems natural for PSG to lose. But indeed, as a strong team in Ligue 1, it is only natural that the quality of the second tier players can also have good abilities to win in friendly matches like that.
Apart from that, he is indeed the best defender we have ever seen at Real Madrid, but because he is old, of course, the decline in his performance is the main point for the team to recruit him. Even if the team from MLS manages to recruit him, I will make sure he will play for the next 1 season before announcing his retirement.