Hello joachim194,
Thanks for reaching out to Apple Support Communities! We understand you are experiencing some issues with the call history for your other SIM card in your iPhone. We are happy to help provide some guidance.
We want to make sure that your other SIM is still active in your iPhone so the call history can be displayed. Are you still able to use both of the SIM cards in your iPhone? Does the call history show correctly for new calls that you make using either of your SIM cards?
Using Dual SIM with an eSIM
Keep us updated on how it goes or if you have any questions.
Cheers.