Hi @project_2501 and thanks for your question.
As quark mentioned, p5.js and Processing have distinct development paths. This is reflected in the p5.js README:
p5.js was created by Lauren Lee McCarthy in 2013 as a new interpretation of Processing for the context of the web. Since then, we have allowed ourselves space to deviate and grow, while drawing inspiration from Processing and our shared community.
Though both Processing and p5.js are supported by the Processing Foundation, each project has its own unique goals, values, and priorities, and uniformity across the ecosystem isn’t a current objective. Other active projects like py5 also implement the Processing API in their own unique way.
Any further discussions would need to happen within the respective development communities on their issue pages.