can’t change checkout page

Hello, I installed your plugin, activated the Menu Cart and added it to the main menu. But I am not able to replace my current checkout page because your plugin does not seem to offer me a different checkout. But this was the reason why I purchased it. I have problems with my current Elementor theme and the design of the checkout page. and hope to replace this with your checkout page which is supposed to be much better according to your advertising. But there is no checkout page anywhere that I would activate instead of my current one. Not even your documentation mentioned how to activate your checkout page.