That’s a pity! Perhaps it was the terminology “Call for Proposals” and acronym CFP used in the announcements. Myself I am more sensitive to the word “Abstract” in such announcements and had almost mistaken such announcement for the proposals for the sessions instead.
See JuliaCon - Julia Programming Language
In particular JuliaCon 2024: CFP is now live!
Also on the JuliaCon 2024 website it must have been stated.