This should work… in the class editor make the following classes and add the styles.
This approach means you can just add images as normal to the carousel.
.carousel
height = 100vh
width = 100%
overflow = hidden
.carousel-inner
height = 100%
Then in the page header add.
<style>
.carousel .carousel-inner img {
object-fit: cover;
height: 100vh;
}
</style>