The Holy Spirit can use Christians to lead people to Jesus, but only Jesus can save. But I would not label Copeland or Duplantis as false as I keep saying that's up to God to decide.
And we could bring Joel Osteen into this topic if we wanted to, and use Osteen as an example. We cannot say Holy Spirit has not used Joel Osteen to lead anyone to Jesus, as he leads many around the world every Sunday in the Salvation Prayer leading them to Jesus. So people do get led to Jesus by flicking on some Tele-evangelist on TV. So we got to be very careful to judge them.
I fear God enough to stay away from putting labels like that on any Christian preacher.
I do fear for people who claim the authority to bind illness or command the weather.
To publically speak words against covid19 so it would totally disappear, and then for nothing to happen, suggests the words are delusion.
If someone who is so pompous to claim this authority and fail, why should anyone accept anything else they say.
They are not speaking from the Lord with His authority, while claiming they do.
covid19 could well be a judgement on the obese, self indulgent, sloughful world of excessive wealth we now live in.
How many believers have cried out in repentance and mercy for God to lift His hand of judgement?
We are in His hands, and He commands everything, and by His grace both sinners and saints are blessed.
But for how much longer?