While there are areas of the media in which Sudan does get coverage and audience interest, it doesn't get as much coverage as it should by mainstream Western news outlets. I think there are quite a few contributing factors...
The conflict, starvation and deaths have been going on for a while now. Mainstream news outlets tend to give prominence to articles about new, acute events in preference to longer-term situations. This happens with other conflicts too - eg Ukraine, Israel and Palestine used to be in the news more than they are now. People want to read and publish new articles about new, exciting things, rather than the same or similar articles. It happens with things that aren't conflicts too, eg Brexit, which dominated headlines for a period and then faded away from the front pages even while issues were ongoing.
It's a civil war in a country which was not a major player in international politics prior to the conflict. Many people didn't know much at all about Sudan prior to the conflict (they might not even be able to find it on a map). What may be perceived as "the internal politics and struggles" (quoting someone who explained to me why they weren't interested) of a country about which many people have little pre-existing awareness or interest, doesn't generate the same amount of attention (and revenue) from readers, who often have more interest in things with which they feel more directly connected. People don't tend to go, "Oh, there's something horrible happening somewhere I've not heard of - I'd better find out more", in the same numbers as they flick or scroll past to read about Trump or welfare reform or crimes committed closer to home. Because it's a civil war in a country which wasn't particularly influential globally prior to the conflict, the situation doesn't have the same international impact as, for example, one of the longstanding 'superpowers' of the world being involved in a war against a neighbouring country in circumstances which are causing alarm across Europe.
Racism against Black people and Africa. Mainstream media coverage tends to focus on things which are of interest to readers. Many readers of UK media (as an example - other countries have the same issue) are less interested in news from Africa and news about Black people than they would be about similar news elsewhere in the world. So, articles about events in Africa don't get the same attention and don't get the same prominence as they might if the geographic location or demographics of affected people were different.
The majority of people living in Sudan and affected by events there are Muslims. It's often said on here that people don't pay attention when Muslims are killing Muslims. There's a degree to which that is reality-based. There is less attention paid to situations in which Muslims are caused harm, than is the case when harm is being caused to people who aren't identifiably Muslim or presumed to be Muslim. This can be seen in people's engagement with mainstream media, ranging from attitudes towards individuals (eg less sympathy for a victim of a crime or an accident) to interest in large-scale news events. Maby people pay more attention to articles and events in which they can continue to reinforce their pre-existing concepts of Muslims as 'other', 'backwards' and 'dangerous'. News coverage of Sudan is therefore doubly affected by prejudice.
Perceived lack of UK/other Western involvement or support for a 'side'. While people who follow the situation will be aware of how different countries around the world, including Western countries, have had different levels of involvement, the impression given to many people is that the West is largely not directly involved, other than expressing concerns and sending aid. So, there's less of a feeling of personal investment or responsibility. Many people would broadly agree with statements saying how the loss of life is tragic and with sending aid, so there can be a sense of the government "doing what they can". When that happens, people can feel like they don't need to follow the news about something as much, because "it's very sad, but the government's doing what they can, and there's no point getting myself upset about it" (again quoting someone who explained to me why they didn't want to read about Sudan and other conflicts like Sudan). In contrast, when people disagree with what they see their government doing, they can feel more personal responsibility to educate themselves and express their opposition.