Had a look anyway and I have some answers:
Ones here with the K shaped vents on mine all appear to be 1800uf 6.3v caps. Can’t check them all but all ones I can see are that value.
The Mercedes logo style vent caps on the right side of my image appear to all be 1000uf 16v.
The smaller Mercedes logo style vent caps on the left side of my image are 1500uf 4v.
I can’t tell for any of the other through hole caps.
Then there’s the sea of SMD caps… those are easy to identify values of but god are these gonna be a nightmare to fully recap.
For any other caps not mentioned here, I’d just go and check yourself by desoldering.
Keep in mind this is for my revision only too, which is a 2.0GHz 20” iMac G5, Ambient light sensor.