How to do backward animation in blend space ?

Is it even possible to make a backwards walking animation in blend space? Not a single guide on YouTube shows how to make such an animation)) In all examples, the character simply turns around. In my case, I want the character not to turn around and walk backwards with the desired animation

https://www.youtube.com/watch?v=qvGGBVBDWvc&t=504s&ab_channel=TorchlightStudios - Here he made backward movement

Sorry, but this tutorial breaks custom character controls (

Are there any other solutions? Why do animations work as they should in Blend Space, but in practice everything is broken?

In your blend space, it is only one direction (horizontal). But for forward and backward movement, you have to two direction: horizontal and vertical. In video two direction. So create blend space like there.