Apple Wallet Boarding pass customisation

One of our airline customer requested us to customise the boarding pass design of apple wallet to meet their business requirements. Need to change the default flight icon between origin and destination. The default logo of flight image contains four engines where the customer need to show only 2 engines to meet their business standards. Have gone through apple wallet design document and couldn't find any option to change that. Is it possible to change?

Apple Wallet Boarding pass customisation
 
 
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