The CIA may have funded ISIS but the CIA doesn’t control ISIS. ISIS is not a mercenary army. They’ll take money wherever they can get it, but their allegiance is to Islam, not the CIA.
Blowback: ISIS Got A Powerful Missile The CIA Secretly Bought In Bulgaria
https://www.buzzfeednews.com/article/aramroston/blowback-isis-got-a-powerful-missile-the-cia-secretly
US Officials Ask How ISIS Got So Many Toyota Trucks
https://abcnews.go.com/International/us-officials-isis-toyota-trucks/story?id=34266539
ISIS may have obtained anti-tank missiles from the CIA
https://www.businessinsider.com/isis-weapons-cia-missile-anti-tank-2017-12
Female Isis captive reveals role in helping CIA
https://www.theguardian.com/world/2019/may/31/isis-wife-reveals-role-in-helping-cia
CIA Link In Moscow Attack? Old WikiLeaks Article On ISIS Resurfaces
https://www.timesnownews.com/world/europe/cia-link-in-moscow-attack-old-wikileaks-article-on-isis-resurfaces-article-108739235