Via the A11yTalks webinar Accessibility in Action: Indigenous Communities by Meggan Van Harten
Link to font:https://www2.gov.bc.ca/gov/content/governments/services-for-government/policies-procedures/bc-visual-identity/bc-sans
Several typefaces were examined that matched the criteria and a handful of these were tested. Noto Sans stood out as an option as it already had an extensive set of characters supporting over 800 languages, including many Indigenous languages in Canada. The typeface was also originally designed for enhanced readability on-screen.
Under an open-font license, Noto Sans presented the opportunity to access the font files and modify and improve its character sets. With expertise from a typographic Indigenous language expert, and from FirstVoices (an initiative of the First Peoples’ Cultural Council), additional characters and syllabic glyphs were added to support Indigenous languages in B.C. This new typeface was named BC Sans and first launched in 2019.
I edited my post and added a link to the font.