Apple pay not appearing in Shopify checkouts

Is this a known issue? My team and I are working on a site that uses Shopify and the ReCharge subscription app for product checkouts, and have noticed issues from customers no longer seeing Apple Pay as an option. We have the checkout option added in the admin for both Shopify and ReCharge, and often can see it appear on Apple devices when testing, but can also (on the same device) sometimes not appear as a payment option performing the same test. This is seen across multiple Apple devices, and we are seeing reports of this globally in different stores (the US, Australia, the UK). Is this a known issue and has anyone seen this issue appear before specifically for Shopify web sites? Thank you in advance!