App got rejected with this reason,
ITMS-91065: Missing signature
Your app includes “Frameworks/FMDB.framework/FMDB”, which includes FMDB, an SDK that was identified in the documentation as a privacy-impacting third-party SDK. If a new app includes a privacy-impacting SDK, or an app update adds a new privacy-impacting SDK, the SDK must include a signature file. Please contact the provider of the SDK that includes this file to get an updated SDK version with a signature. For details about verifying the code signature for a third-party SDK, visit:
https://developer.apple.com/documentation/xcode/verifying-the-origin-of-your-xcframeworks
.