Migrating Subscriptions From Shopify Payments To Authorize.Net

We are considering migrating from Shopify Payments to third party processing via Authorize.net. We have thousands of subscriptions through via the subscription app SKIO. We are getting mixed answers on what will happen to the existing subscribers. Once we switch, will new replenishment orders that are pushed from SKIO still charge properly through Authorize.net moving forward? Or do they get stuck in limbo after disabling Shopify Payments? Hoping someone here can clear this up for us. Thanks in advance!