Side loading an app

We have a .ipa file that we need to side load on iPhone via USB connected to a MAC. IPA file will be on MAC. We can't use enterprise license. We have a business use case where we need to side load the app. Any way to do that or can be reach apple support for this? Please help.

Note: The iPhones attached will not have the Apple ID logged in. There are companies who are side loading the app for business purpose on the customers phone.

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Side loading an app
 
 
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