Arcadier does not hold any funds on behalf of the marketplace and sellers no matter what payment processors you use.
If you use Stripe & PayPal, all funds are directly transferred to the marketplace admin and seller.
If you have generic payment processors enabled, as the marketplace admin, you will be the Merchant of Record (MOR) and all marketplace transactions will first be transacted to you. You will hold all funds before disbursing it to your sellers separately.