Thank you, after "lunch" I came back and saw your comment and then ran sudo pacman -Syu
to get the updated garuda-updater. it got 2.5.5-1 and now it works both SKIPMIRRORLIST=true and without(run normally)
edit: though now that i think on it sudo pacman -Sy garuda-update
should have done it as well and might be the better solution to suggest