The DejaVu Serif Condensed Italic font is available globally in my system (DejaVuSerifCondensed-Italic.ttf).
This font is available in darktable however I can’t make it visible in Gimp 2.10. I guess Gimp shows it as ‘Semi-Condensed’ but they don’t look alike.
I like the way darktable renders this font and I would like to have it exactly the same in GIMP but I am unable to achieve it. The Gimp version is like bold version of this font.
edit: font viewer renders this font the same way darktable does. So it is something with Gimp.