You can also find first look reviews about it:
But now an image leaked of the Yongnuo YN50mm F1.8S DA DSM for Fujifilm X at the Chinese Weibo account of 独立摄影师联合会.
Still 50mm, still f/1.8, but no “PRO” badge.
In short: it’s basically the X mount version of the already available Yongnuo YN50mm F1.8S DA DSM II for Sony E mount.
The non Pro is definitely smaller and has no display on the lens.