With the infrastructure being 100% owned by Cameroon, the mines are fully de-risked from the perspective of other mine bidders who may be apprehensive of China owning the port and rail.
IMO, interested parties such as India will no doubt be a potential strong contender. Have a look of the following articles:
India Government aims treble steel production capacity by 2025. Indian companies plan $46.1B investment to build new steel plants.