Recurring payments on Lightning are tricky, state channels are the obvious path, but they're not Stripe-easy yet. The `lnurl-pay` spec can handle static invoices for subscriptions, but you'll need a backend to generate them. Have you looked at `LNBits` or `BTCPay Server`? They both have subscription modules. `BTCPay` is more robust, `LNBits` is more hackable. Depends if you want stability or you're feeling experimental.