Technically, the Fintecture solution allows you to make a payment with no limit of amount. However, you have to take into account the ceilings fixed by the banks, which can vary according to various factors, specific to each establishment: type of account (company, pro or individual), subscription, contract, etc.
You can contact your bank to change your limit.
NB: If a bank applies an amount limit to all users, the information will appear on the payment interface, and you will not be able to select it if your order exceeds it.