But under a more likely scenario, Biden would take advantage of rules that allow unlimited transfers to the candidate’s political party. In that case, Biden’s Democratic Party could spend the money supporting the party’s new candidate.
He can also transfer to a Super PAC.
Edit: In case you don’t believe me again.
Biden could also potentially transfer his funds to an independent super PAC if Harris is not on the ticket.
Literally from the article you linked.
He can also transfer to a Super PAC.
Edit: In case you don’t believe me again.
https://www.vox.com/joe-biden/361991/361991biden-campaign-funds-after-drops-out