As far as I remember, this is Theo the side of the story
Tethyan was awarded this contract when there was no guarantee of we will ever find gold in Reko Diq. It was a contract on find, invest, extract, get share basis so Tethyan was taking big risk for this investment. We have similar gas field projects when the companies are awarded contracts in hope that they will find oil or gas and and we can start extracting it
So Tethyan found the gold and copper reserves thousands of meters down the earth… it was valued over 60 billion dollars at that time… (should be worth a lot more in 2021) … so the Government started drooling and potentially finding excuses to come out of the contract… we saw the consequences of it
There are very few companies in the world who have the technology to extract gold at this depth so Tethyan is one of the most renowned one… original contract was also 50-50 basis with the the government earning 25% shares from extraction and another 25% from taxes making it effectively 50-50 so I am not sure if the new agreement is the rephrasing of the old agreement or tethyan is actually willing to give 25% share from their pocket especially when the have won the case in the court and can potentially earn billions of dollars for free in penalty