The extradition treaty between France and the United States allows France to deny extradition when the extradited party faces serious consequences related to health or age. https://en.wikipedia.org/wiki/Michael_Mastro#Attempted_extra...
https://www.france24.com/en/video/20190412-wikileaks-fouder-...
The last public stance of the french government (that I could find) on the matter was that they don't "offer asylum to someone who’s not asking for it"
https://www.independent.co.uk/news/world/europe/julian-assan...
And he made a request in 2015 but was denied.
https://www.reuters.com/article/us-france-assange/france-rej...
Plus, I'm not sure if he qualifies for the status of refugee (asylum seeker) as defined here : https://en.wikipedia.org/wiki/Convention_Relating_to_the_Sta...
As a result of events occurring before 1 January 1951 and owing to well-founded fear of being persecuted for reasons of race, religion, nationality, membership of a particular social group or political opinion, is outside the country of his nationality and is unable or, owing to such fear, is unwilling to avail himself of the protection of that country; or who, not having a nationality and being outside the country of his former habitual residence as a result of such events, is unable or, owing to such fear, is unwilling to return to it.
From the US point view at least (and the UK according to the latest judgment), he's being extradited for a crime not a political opinion.
[0] https://www.europe1.fr/international/eric-dupond-moretti-va-...
[1] https://www.francetvinfo.fr/faits-divers/affaire/assange/eri...
The irony is that, now that he belongs to Macron's government, he seems not to be allowed to issue asylum requests :/
This is off-topic, but after a google search, I found something more ironic: he said a few years ago that he would never accept a position in the government.
https://www.lci.fr/politique/video-remaniement-garde-des-sce...
An intimidating figure who has likened the courtroom to a theatre, Dupond-Moretti swore as recently as 2018 that he would never be justice minister, saying no one would have the "utterly absurd" idea -- "and frankly I would never accept such a thing".
https://www.france24.com/en/20200708-france-s-acquittator-so...