I've Found All These Resources Incredibly Useful

Developing Inclusive Mobile Apps - Building Accessible Apps for iOS and Android, by Rob Whitaker (Apress)

Make it Accessible - Creating applications that are truly for everyone, by Create with Swift (Imaginary Institute)

Building accessibility into your company, team, and culture with Sommer Panage in Swift TO

Appt News (Accessible Mobile Apps)

AppleVis Extra 109: Interview with Klemens Strasser, Developer of The Art of Fauna, by AppleVis

Episode 81: Tools and Tips for Mobile App Developers, with Rob Whitaker, by Parallel

Beyond Accessibility Compliance - Building the Next Generation of Inclusive Products, by Sukriti Chadha (Apress)

//TODO: Blog, by Quintin Balsdon