Is this OS a fork of SerenityOS (also completely written from scratch in C++)? I'm amazed how many single person or small team developed operating systems are

Is this OS a fork of SerenityOS (also completely written from scratch in C++)? I'm amazed how many single person or small team developed operating systems are out there. Another one I like is RedoxOS (written in Rust) and Resea (microkernel written in C). Also, there's KolibriOS (written entirely in Assembler).