This question looks very similar to a topic in the Bitmovin Community: https://community.bitmovin.com/t/bitmovin-player-contains-bitcode-app-store-upload-fails-xcode-16/3570/1

To summarize the relevant information here:

Bitcode support was removed in June 2023 in Player version 3.40.0. Please make sure to use at least 3.40.0, ideally upgrade to the latest (latest is version 3.86.0 as of 28th March 2025).