@PawelDrzyzga-5087, Research and find a similar issue as ours, the issue is fixed by putting the company portal app as a required app.
https://www.reddit.com/r/Intune/comments/e50vdw/company_portal_ios_app_needs_updating/
Note: Non-Microsoft link, just for the reference.
Could you check if we deploy the company portal app via Intune as a required app? If we remove the group and add it again, will the new version be installed?
Thanks and I look forward to your reply.
If the response is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.