I just went to the Statcast site and saw some spring training games, but when I did a search it returned this warning at the top:
Only games played in the spring homes for these teams will return data: ARI, COL, DET, MIA, MIN, NYM, NYY, PHI, PIT, STL, TOR.
So yes, there is some public data, but it's limited.
There have been some write-ups using spring data from around the league. Broxton gets mentioned in this article:
Former Twin prospect Akil Baddoo gets mentioned in this one too:
That makes sense, as I know the underlying tech needed for some of this stuff hasn't been universally implemented in spring training facilities (but is available in most of them, IIRC from previous reading).