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If I understand you correctly, are you planning to have 2 payment integrations in 1 form? If yes, then it is possible. However, you will need to create 2 forms and each form has its own payment integration. You will be using the Iframe Embed widget so that you can insert the 2nd form to the 1st form.
Please check this very detailed guide: How-to-Create-a-Basic-Multiple-Payment-form
Hope that helps. If you have any questions, let us know. Thank you.