Poly count is at the very bottom right of the screen.
In the note section for metadata write the info you want and turn on "burn into image"
A different way to see statistics is to enable the overlay in the 3D viewport as shown in this post:
Bottom Status Bar Doesn't Show Verts, Faces, Tris Information In v2.9a
Here's a script to fill the notes with the selected object's stats: adapted from :
Show the polycount of selected objects in object mode
import bpy verts, edges, polys = 0, 0, 0 dg = bpy.context.evaluated_depsgraph_get() # Getting the dependency graph for obj in bpy.context.selected_objects: obj = obj.evaluated_get(dg) # This gives the evaluated version of the object. Aka with all modifiers and deformations applied. mesh = obj.to_mesh() # Turn it into the mesh data block we want verts += len(mesh.vertices) edges += len(mesh.edges) polys += len(mesh.polygons) bpy.context.scene.render.use_stamp_note = True bpy.context.scene.render.stamp_note_text = "Verts: "+str(verts)+", Edges: "+str(edges)+", Polys: "+str(polys) bpy.context.scene.render.use_stamp = True To use go to the scripting window, create a new text, paste the script and run it.