Hi,
The Bambora payment method has an option "HANDLE NO RECURRING". If that option is turned off, then it will only appear when the products in the cart are subscription products (linked to a subscription plan from the HikaSubscription extension) with the recurring payment mode activated (so that payment for the renewal of the subscription is automated).
I can see you don't have HikaSubscription, so your products is normal products. If you want this payment method to appear during the checkout, this "HANDLE NO RECURRING" setting needs to be turned on.