From USSSA interpretations reference bunt attempts:
In bunting, any movement of the bat toward the ball, when the ball is over or near the plate area, is a strike. In 2009, the definition of an attempted bunt changed. It is a strike if the bat is over the plate and the bat is not pull back from being over the plate. Holding the bat over the plate and not pulling it back is an attempt to bunt the ball. A strike should be called.
Previously discussed here, Eddieq and others detailed differences. MTR, you had pretty much the same reaction on the topic in 2015, lol!
https://www.discussfastpitch.com/softball-rules-questions/24345-bunting-rule.html