I don't understand your question? If ECOWAS didn't get involved in the coups in Mali, Guinea and Burkina Faso then it is crazy for them to involve themselves in Niger.
These coups are clearly directed at the French. There was also an attempted coup in Ivory Coast a year or two ago. So that leaves Senegal, Ivory Coaast, Togo and Cameroon as the clear next targets in West Africa. Who is behind them is up for debate.
The difference was the other coups were against other guys that did coups this was a coup against a democratically elected government.
How is these coups against the French? When they say Travel broadens you this is what they mean. You think that France doesn't and will not economically dominate Niger now? There's Banks and Mines and infrastucture all provided by the French not to mention the Aid and tourism and expat dollars that Niger gets from the French. The Cell phone and Internet company doesn't go away because of a coup then finally think about it you're a Nigerian official what changes under the new regime? Are you gonna get your pension just because you supported the old regime? Will you be replaced? The 2nd in the Command of the Presidental Guard what does he get? Why not do a coup himself since it was so easy shyt could easily go the way of the Romans
en.wikipedia.org
Constintine finally got rid of the Pretorian guard all together
The Nigerians have Armourd vehicles, aircraft, heavy weapons all that needs to be maintained. Even if they called Wagner in they can't replace or and retrain on all new weapondry like that.
By the way most Nigerians are functionally illiterate.