Hi @Allard Schuurmans Welcome to Microsoft Q&A thanks for posting your question
I'm sorry to hear that you are facing this issue. This is because of the Major Version Retirement Policy for Azure Database for MySQL The document provides a table that shows the major version retirement dates for Azure Database for MySQL. MySQL 5.7 will be retired on October 31, 2023, and MySQL 8.0 will be retired on October 31, 2026.
Please go through "What will happen to Azure Database for MySQL service after MySQL community version is retired in October 2023?"
https://learn.microsoft.com/en-us/azure/mysql/concepts-version-policy#major-version-retirement-policy
Please let me know if you have any additional questions
Regards
Geetha