To be fair to Neymar, he was absolutely bossing it at the beginning of last season before his injury. Highlight packages of PSG outside France was only focused on what Neymar was doing.
Then he got injured, and struggled to reach back to his level. Not to mention after his antics at the World Cup (first World Cup with VAR so he was made an example) he lost the media which is essential for marketing hype.
After France winning the World Cup Mbappe is now the golden goose and will probably be PSG marketing focus going forward.
He has made a huge amount of money moving to PSG, but it has harmed his legacy and perception.
Think Gareth Bale, he sealed Real Madrid the CL with his incredible overhead kick, but no global media cares now. Because they were marketing Ronaldo. Neymar is now in that position to Mbappe.
I am sure he will push for a move to Madrid, if anyone knows how to re-establish him as a star it is Perez.