From DataFrameTime—Help | ArcGIS Desktop, the following example exports each "Time Frame" as a unique file:
mxd = arcpy.mapping.MapDocument(r"C:\Project\Project.mxd")
df = arcpy.mapping.ListDataFrames(mxd, "Traffic Analysis")
df.time.currentTime = df.time.startTime
while df.time.currentTime <= df.time.endTime:
# An example str(newTime) would be: "2008-12-29 02:19:59"
# The following line splits the string at the space and takes the first
# item in the resulting string.
fileName = str(df.time.currentTime).split(" ") + ".png"
arcpy.mapping.ExportToPNG(mxd, os.path.join(r"C:\Project\Output", fileName), df)
df.time.currentTime = df.time.currentTime + df.time.timeStepInterval
p = arcpy.mp.ArcGISProject("CURRENT")
m = p.listMaps("Yosemite National Park")
for lyr in m.listLayers():
lblClasses = lyr.listLabelClasses()
as an example of how to access the map part, but I'm not seeing any documentation or examples on how to access the time property, if a Pro map has a time-enabled layer. In context, I'm working Working with a multidimensional raster layer—ArcGIS Pro | ArcGIS Desktop where I have some 100 rasters, each with a time stamp, and I want to export each "Step" as it's own JPEG.