Is this positonal Queen sac true ?

Yes, white has full compensation. The position is equal.

I find this varition ( computer vs me game )
and computer says black is winning after white is better after play some moves equal I think this position unclear at some varitions

I find this varition ( computer vs me game )
and computer says black is winning after white is better after play some moves equal I think this position unclear at some varitions

The computer’s going to be off if it’s not a very deep evaluation, because a human player can just see that black’s playing without a light-squared bishop. Sure, you can put it on a6, but it won’t do much. Even the knight’s off-side, if white’s lucky they can get an attack before both rooks can defend.

A quick glance: white‘s dark squared bishop is a valuable as a rook.

In the long run, Black has more material.
In the short run, his surplus is sitting at the queenside, while the g-file is one big hole that White can pour all of his army into very quickly.

Both sides need to play extremely precise. Lots of "only-moves" in the main line.