Trending @Infosys; Can my manager extend my Allocation End Date?

Hi, I am being released from my Project sometime next week as per Alcon, with my next allocation being shown as support already for the remainder of this month after being released from the project.

The reason for my release is my declining mental health, I had asked for my release because of this reason months ago. Now, I am wondering whether my Manager can extend my allocation because of any petty reason as she doesn't like me. This project has already caused me insane mental anxiety and stress and I don't want to stay here anymore.

So does my Manager have the authority to extend my allocation when according to alcon, I will go to support in 2 weeks?