I feel like I have seen better analysis of this elsewhere. In a nutshell, it is not simply a civil war. Regional actors are involved as a proxy war: Saudi Arabia against the UAE, for example (who are also having a proxy war in Yemen). And Egypt against Ethiopia. The wikipedia article covers some of the complexity:
https://en.wikipedia.org/wiki/Sudanese_civil_war_(2023%E2%80...
EDIT: This is what I am thinking of: https://youtu.be/bpH37vGoRJc