\input{umtest-preamble}
\usepackage{unicode-math}
\begin{document}
\setmathfont[math-style=TeX]{Free Serif}
\[ıȷ\quad 𝚤𝚥\]
\[\mathup{ıȷ}\quad \mathup{𝚤𝚥}\]
\[\mathit{ıȷ}\quad \mathit{𝚤𝚥}\]
\setmathfont[math-style=upright]{Free Serif}
\[ıȷ\quad 𝚤𝚥\]
\[\mathup{ıȷ}\quad \mathup{𝚤𝚥}\]
\[\mathit{ıȷ}\quad \mathit{𝚤𝚥}\]
\end{document}
