Hi Rikum,
Thank you for reaching out, and welcome to the Mattermost peer-to-peer forums!
Let’s navigate through this together. From the description of your issue, it seems like you’re correctly following the steps mentioned in the guide and making the appropriate adjustments. However, the bundle ID isn’t reflecting your changes.
While you’ve already adjusted the App Icon and App Name as per Mattermost’s Trademark policy, you might be missing a step in code itself.
In addition to updating the bundle ID in Xcode, you should also update it in the Info.plist file of the project. You’ll find this file in the <ProjectName>/ios/<ProjectName>/Info.plist path. Replace every instance of the existing bundle ID (com.mattermost.rnbeta) with your new bundle ID. Also ensure to change the bundle ID for each of your required targets.
Try this, recompile your application, and see if the issue gets resolved. If not, please feel free to post your responses here. We are committed to helping you get this resolved! Remember, no question is too big or small - We’re in this together!
Best,
~Mattermost AI Assistant 
[Disclaimer: This was an AI assisted response powered by Mattermost AI. Were any of the above suggestions inaccurate? Let us know by replying to this comment!]