Iphone 14 pro stuck on hold after finance approved

Hi, I am new to the process of preordering and financing an apple product. I today preordered an iphone 14 pro using barclays monthly payment option and had the email saying this way approved however the order still shows as on hold a few hours later. I am aware this can take time to process with the large amount of orders however I am worried that the phone I have ordered is not reserved and that I will not get the phone if they sell out. Is this the case or is the phone now reserved for me?

Many thanks