Razorpay's payment window offers UPI, debit and credit cards, netbanking and wallets, unless the FleetKraft team set fewer methods for your company: the Billing page lists yours under "Pay with". Each payment with Pay is a one-time payment: there is no mandate, so you approve each payment once when you make it.
When your Billing page shows Turn on autopay, autopay in India is set up with an eMandate on your bank account (recommended) or a card. UPI is not offered for autopay, because banks declined UPI mandates above INR 15,000.
UPI usually allows up to INR 1,00,000 a payment, which covers 1 month; for 3, 6 or 12 months use netbanking or a card. Every amount includes 18% GST, and the receipt shows it.