Here are the first leaked pictures of the upcoming Yongnuo 85mm lens for Nikon Z-mount (I assume it will be f/1.8):
Yongnuo is also expected to announce at least two other new mirrorless lenses:
New Yongnuo YN 50mm f/1.8S DF DSM full-frame lens for Sony E-mount
In the US Yongnuo lenses are sold at Adorama, B&H, and Amazon.
Via NikonRumors