There is nothing to refute, up to you to put up something that supports the off the cuff comment that had no substantiation given, in other words, it was BS for the gullible.
There is absolutely zero evidence that Biden was in negotiations with Qatar to obtain the plane.
Trump made it clear he was looking for a plane in March 2025.
If Biden had of been in discussions with Qatar, Trump would have whinged that Biden was doing a bad deal.
Trump's ego wants to waste taxpayer cash on a plane that isn't needed.