Hi Raul,
Please share your website link. it will be possibly some CSS issue.

Thanks

mundobici.net

Hi @Raul
I have seen your given link .Theme Style is overriding some plugin design . Well, add the below-given CSS to an additional CSS section at the backend.
.woocommerce-checkout-review-order-table tr {
display: flex !important;
}
.woocommerce-checkout-review-order-table th {
width: 25%;
}

There is something else I noticed. you have not saved the style section in plugin setting. So please go to Dashboard->checkout settings->Global style. Choose your colors and save.

¡Thanks! Solved