The LoginWithAmazon SDK is currently available as FAT binary .framework. FAT .frameworks are explicitly disallowed in Xcode 12.3+. Please either support SPM, or provide a .XCFramework
As per Apple’s guidance, FAT binary frameworks are no longer supported in Xcode 12.3+
“The framework isn't built with a supported configuration -- iOS and iOS Simulator should never appear in the same binary. You should follow-up with the support channel for the framework vendor and see if they have a fixed version (which needs to be a XCFramework).