It's Called Fog Panther. Flathub: FogPanther Claims to be written in GTK4. Looks like a modified GIMP. Made by a business consulting firm, looks sketchy to me.
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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
Community icon by Alpár-Etele Méder, licensed under CC BY 3.0
While the styling looks vaguely similar to inkscape none of the toolbars or anything have the correct tool contents to be inkscape
Yeah you are definitely correct. The panels and layout look very similar but the tools not so much.