Smart switch - Confused about current wiring
Yes, this can be installed here

It appears that your installer was smart and not only provided neutral at the switchbox, but provided you with a nicely color-coded set of wires to work with, too.  You'll just need a length of black #12 stranded THHN to pigtail the always-hots with, after trimming back and removing the length of always-hot black wire that goes past the screw.  Attach the black stranded THHN to the black screw on the switch, then nut it in with the remaining black wires.  The red wire then lands on the red screw on the smart-switch, and the existing white pigtail from the smart-switch goes to to the bundle of white wires.  Last but not least, a grounding pigtail and screw need to be added to the back of this box, and the existing ground wires removed from the existing (mounting?) screw and nutted to the green grounding pigtails present.  Once all that's done, button the box back up, turn the breaker back on, and enjoy your new smart dimmer!