I'm currently building a site in WordPress Gutenburg. The theme documentation gave insturctions for the plugin CustomFonts. I have set this up correctly and uploaded the heading (Active) & body font (Novecento Sans Condensed) as directed using the link provided by Adobe. Then the theme directions say to add this code to the customizer > "Additional CSS" section:
Unfortunately we're not familiar with this plugin. However, at the top of the plugin page you linked it says "This plugin helps you easily embed custom fonts files (woff2, woff, ttf, svg, eot, otf) easily in your WordPress website."
Adobe Fonts does not provide font files of any type. I believe the CSS referenced in the theme documentation only specifies the font files you upload to the plugin.