[Tex/LaTex] Greek sans serif math

Question

Is it possible to use unicode-math to fake sans serif Greek math letters? I use \symsfit{x}(f) for the Fourier transform of x(t). I would like it to work for Greek function variables too. Can I, for example, use one standard font and let Greek sans serif letters, eg \symsfit{\phi}, be set in a different font, so that it can be told apart from its transform \phi?

Answer 1

\documentclass{article}
\usepackage{amsmath}
\usepackage[math-style=literal]{unicode-math}
\setmathfont{XITSMath}
\setmathfont[range=up/{greek,Greek}]{FiraMath-Regular.otf}    
\begin{document}

\[ \mupGamma(\mupvarphi,\muptheta)=\mupbeta \]
\[ \Gamma(\varphi,\theta) =\beta \]

\end{document}