PeaZip just a front-end
Not a fork.
It requires 7-zip libraries, and a lot of others: from https://peazip.github.io/peazip-sources.html
7z (LGPL), p7zip (LGPL), 7-Zip-zstd codecs (LGPL), Brotli (MIT License), Zstandard (Dual license BSD / GPLv2), ARC (GPL), ZPAQ/LPAQ/PAQ8* (GPL), QUAD (LGPL) / BALZ (public domain) / BCM (Apache v2), strip and UPX (GPL) binaries are needed to support mainstream file formats."