Integration of Razorpay

I have a flutter program and want to integrate Razorpay. I have already done it on Android - but iOS is giving an issue.

These are the errors that I am getting
a) project/ios/Pods/razorpay-pod/Pod/Razorpay.framework/Modules/Razorpay.swiftmodule/armv7-apple-ios.swiftinterface:12:8: No such module '_Concurrency'
b) Failed to build module 'Razorpay' from its module interface; the compiler that produced it, 'Apple Swift version 5.5.2 (swiftlang-1300.0.47.5 clang-1300.0.29.30)', may have used features that aren't supported by this compiler, 'Apple Swift version 5.3.2 (swiftlang-1200.0.45 clang-1200.0.32.28)'
c) project/ios/Pods/razorpay-pod/Pod/Razorpay.framework/Modules/Razorpay.swiftmodule/arm64-apple-ios.swiftinterface:12:8: No such module '_Concurrency'
d) Command CompileSwift failed with a nonzero exit code

XCode version which I have is 12.4

I want someone who has already integrated razorpay with flutter on iOS - if you have not done it before please do not connect