Connecting SimplePay is contract-dependent: it stays closed until there is a signed agreement between Bokko and OTP SimplePay. This is not a misconfiguration on your side and not a plan question — there is no step you can take to unlock it right now.
What you see in the app
On the Integrations page, clicking Set up in the Online payments section opens the Choose a payment provider dialog. It has three groups: Available now, Coming soon and Available on higher plan. OTP SimplePay sits in the Coming soon group with a "Coming soon" pill and no way to select it.
What to use instead
- Stripe — international card payments. Connectable with no plan restriction, and it supports the widest set of capabilities. See Setting up Stripe Connect.
- Barion — Hungarian provider, bank card and Barion wallet. Connectable from the Pro plan. See Connecting Barion payments.