There have been no unaccounted for F-22 losses. There are only a fixed number of them and so any loss would be immediately noticed by the public, the families, etc. The F-22 is probably the most watched and studied aircraft the US has, and only occassionally and for short periods to this date have they even been rotated off shore.
Nothing remotely resembling thios has occurred...and if it came down to it, I am sorry but an armed F-22 would take down two J-10s. It's scoring 4 and 5 to 1 victories regullarly against the best US and Allied aircraft sent up against it.
As it is, that is immaterial because this did not happen.