An interesting essay from Vijay Prashad on the role of Rwanda. He explains that Rwandan troops are being used as a proxy force for the French.
He points out the motive for why Rwanda intervened in Mozambique. It was to protect the energy corporations now operating in Mozambique. The French government already involved in the Sahel were reluctant to intervene directly.
Through the diplomatic intermediation of Macron, the Mozambique government invited Rwanda to send in its army to assist in suppressing the al-Shabaab insurrectionists who threaten the oil and gas operation.
France got what it wanted.