Like other fields of knowledge, project management is constantly evolving. There are new findings from science and practice that are constantly advancing project management as a whole or specific sub-areas.
PMI employees and specially commissioned agencies continuously monitor and analyze market developments and emerging trends and regularly produce so-called "Thought Leadership Reports" (see also LINK), which provide excellent orientation on developments in project management.
The linked newsletter contains an overview of all Thought Leadership Reports 2023: https://buff.ly/41vUQAk
A great summary of the most important documents from 2023.
And in 2024, you can look forward to the 15th edition of the Pulse of the Profession® Report, which is about to be published.