Lizeth stole Isabella's achievements just like that.
Whenever there were new projects, Lizeth would rush to steal the projects and let others know that it was her who suggested the project to the queen.
The queen only approved the plan, gave some money, and the rest became Lizeth's 'hard work'.
But in fact, all the people that worked on the projects were sent by Isabella, and they also knew that it was Isabella who led the project and not Lizeth.
Lizeth actually only lied to commoners who didn't know anything, hiding Isabella behind her own halo.
Isabella sent these people, and they had seen how wise Isabella was.
When they saw Lizeth being so shameless, they couldn't help but complain about this to Duke Fez or directly report it to Mariella.
"Your majesty, this is already too much! The first princess is stealing your achievement and taking it as her own!"