Fonts are activated with Font Explorer X but not available in Hype?
You'll Need to rely on os-fonts or webfonts
Sometimes if you google your font name, there is a webfont version available either from Google Fonts, Typekit, or elsewhere you can use.
If you own rights to the font, you could use https://www.fontsquirrel.com/tools/webfont-generator to generate your own webfont. Then, you can add it to Hype using these steps.
Thanks guys, the font is a client specific one and not available on Google or Adobe Fonts, will try an alternative to see if it gains approval