Select Dynotopo field and check it as true I would like to select the dynotopo and place a check into the field, yet I can only find a toggle script. bpy.ops.sculpt.dynamic_topology_toggle()
I'm not sure where I am going wrong. All other sculpt options seem to work.
All objects have the use_dynamic_topology_sculpting property, which allows you to check whether or not dynamic topology is activated. Therefore your script could look like this:

import bpy


active_object = bpy.context.view_layer.objects.active

if active_object.mode == "SCULPT" and not active_object.use_dynamic_topology_sculpting:
    bpy.ops.sculpt.dynamic_topology_toggle()