Maybe the situation looks something like this:
The DRC has realised there's no more room to drag this out - they don’t want their dirty laundry aired on the world stage, nor do they want the mine tied up for years. Their expensive lawyers have likely told them there’s no way they come out of this looking good. However, their egos won’t allow them to backtrack and let AVZ be involved in the project after all this bad blood. So, they’ve made an offer to Nigel:
Find a serious Western buyer to take your place.
CATH keeps its stake, and they’ll issue the ML on the condition of this sale. This way, the mine operates with both Western and Chinese involvement, hedging their bets. No need for court battles, corruption gets swept under the rug, and the key players walk away with their ill-gotten gains. The DRC public remains none the wiser, and Felix gets a geopolitical win - keeping both sides happy while securing indirect US support against M23.
That’s my headcanon, anyway.