\usepackage{unicode-math}
\setmainfont{Garamond Libre}
\setmathfont{Garamond-Math.otf}

%make integral sign upright
\setmathfont{NewCMMath-Regular.otf}[
  range={"222B-"2233, "2A0C-"2A1C},
  StylisticSet=2
]
