Apple currently engages a number of companies to supply it with the screens for new units of its iPhone 13 flagship series of mobile devices, BOE included. However, the Chinese display specialist has reportedly been obliged to hit pause on fulfilling its order from the Cupertino giant, as it has taken issue with an unauthorized change made to the components in question.
https://www.notebookcheck.net/Apple-suspends-BOE-as-an-iPhone-13-display-supplier-over-a-part-design-dispute.618231.0.html