Solve the Issue when building IOS version of the flutter app

Hello, I'm looking for an experienced IT professional to help with an issue I'm facing while building an IOS version of a flutter app. Specifically, I need deployment support when building the IOS version. I have already attempted to build the app but have encountered an issue. I'm seeking to build the app for the IOS 13 version. Please send me over your qualifications and experience related to app building if you think you can help me with this task. Thank you.