Hello and welcome to the forum Ellietad. Like Tinyplanets, I too have fed Gentle and Guru cold pressed foods but my dogs were adults, not puppies. They are similar in that they are both made by Markus Muhle and AFAIK Gentle was the first UK company to sell cold pressed food, followed by Guru.
Your calculation of 85g seems right to me. AFAIK Lukullus is also made by Markus Muhle but I don't know why the feeding amount is so different. The person who would know is Beate Rothon who owns Gentle pet food. You could send an email if you wish. It you do contact her, please can you let us know what she says? It is odd that Lukullus is almost double the RDA of the other two foods. I have no experience of Tribal or of any other of the newer cold pressed foods. Like Tinyplanets, I can't say why their feeding amounts are different but as she says, they often need tweaking until you establish the amount required by the dog.
On some packets of food there is a disclaimer saying something like guidelines being approximate and actual amount needed will vary. I think this is very true because some dogs are very active, some less so. As with humans, some have a fast metabolism. Neutered dogs will need less.
I can see why your pup seems hungry. I fed cold pressed food for some time and it took me a while to get used to the apparently small amount. It is dense so dogs don't need much. As your dog seems hungry I think you could go a little over the 85g and see if it improves matters. The usual advice is 10% extra. As Tinyplanets has said, keep an eye on his body condition. There are plenty of charts and videos on the Internet. Also monitor the weight. Watch the output because over feeding can lead to loose stools. Poo should be nice and firm, easy to pick up.
Enhancing your pup's food will add variety and additional nutrients - link.
Vegetables are best lightly cooked and pureed because this aids digestion. Go easy on the cheese because of the salt.