Subscriptions support with offsite payments extension

I am developing a custom offsite payments extension app to support Subscriptions in the Indian market using UPI, but I am encountering a blocking issue where Shopify’s native checkout filters out my payment method for recurring orders due to missing vaulting logic. While one-time payments function perfectly, the checkout hides my custom UPI option when a subscription plan is present because it does not detect the required vaulting capabilities—which currently seem restricted to cards and specific native wallets like Stripe or PayPal. I am seeking a solution or workaround to ensure my custom payment method remains visible on the native checkout for subscriptions, given that the mandate creation and credential capture in my flow occur after Shopify’s current filtering logic takes place.