This is the icon theme of The Asteroid Belt
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The Asteroid Belt is a theme suite for Zorin OS Pro/core and lite, but should work on any distro that uses Gnome 3.38 and current version of XFCE. The icon set is based loosely on Papirus and the GTK/Gnome-shell theme is a mod of Layan by Vince Liuice - https://www.gnome-look.org/p/1309214[/ur]

GTK/Gnome-shell: https://www.pling.com/p/1706796/
For more goodies like wallpaper and font: https://github.com/SethStormR/THE-ASTEROID-BELT
Discussion: https://forum.zorin.com/t/the-asteroid-belt-theme-suite/15400