That is mostly to do with France weakening in general from ...
Speaking of France, a bit off topic,
CFA Franc was the currency developed by France for it's West African neo colonies. 14 African countries use it. The CFA was set up originally to prevent the Africans from suffering from the devaluation of the French Franc (FF) after WWII. The French called it "an act of generosity".
The setup mandates that 50% of these countries' foreign reserves always be deposited in the French Treasury, with the French being the sole controllers of the monetary policy of these 14 countries (even after their "independence"). The original exchange rate in 1944 was fixed at CFA 1 : 1.70 FF. Seemed favorable to Africa at first, but this was not to be as the French began to perpetually devalue the CFA every year.
Today, the exchange rate stands at CFA 655 : 1 FF. Devaluing the CFA allowed the French to continually plunder and loot the Africans, primarily their resources which became cheaper and cheaper for the French, and simultaneously, made it more and more difficult for the Africans to develop. As a result, these 14 countries stood (in 2021) with a combined population of 193 million with a combined GDP of $283 billion.
Oh.. and.. many African heads of states who tried to resist were toppled or killed. In recent years, West Africans have been trying to develop an independent single currency, looking at 2027 for it's introduction.