If you achieved TOGAF 9 Certification against either version 9 or 9.1, then you can bridge to 9.2 with the TOGAF Essentials 2018 credential - a 3-hour refresher. This credential leads to an Open Badge to indicate that an individual has knowledge and understanding of the changes introduced to the TOGAF Body of Knowledge in 2018, including the TOGAF Standard, Version 9.2 and the TOGAF Library.
A summary fact sheet is available. The detailed syllabus is available for download from The Open Group Library.