Well, first of all, she was only really fighting against Invincible. Secondly, I think she could’ve done that if she got pushed to her whit’s end, but she just cared too much about Mark, despite his evilness. Plus, Mark made sure to not waste much time.

There’s also the chance that that universe’s Eve isn’t as powerful as ours.

Edit: plot is probably the better explanation. That would make things too boring.

She can’t change organic matter at will due to a deliberate mental barrier, >!she did bypass that in the atom eve special but only with the extreme stress of her family dying. !<

She has a mental block in place that prevents her from using her powers on people and animals

Have you watched the Atom Eve special episode?

Yeah, it’s called “watch the special”