https://wccftech.com/a14x-bionic-tonga-chip-found-both-macbook-ipad-pro-models/

Last time, when a tipster mentioned that Apple’s ARM-based MacBook lineup would not feature a chipset from the A-series, it was immediately assumed that the company would have a different name for its new portable Macs. However, a report originating from China believes against that, stating that both the upcoming iPad Pro models and the new MacBook would sport Apple’s next-generation ‘A14X’ SoC.

A report from China Times mentions the presence of Apple’s ‘A14X’ present in both the upcoming 12-inch MacBook, as well as the iPad Pro.