you can check this one: https://www.spath-schuetzen.de/ its the old version of sppb and height 100% for the image of image-textbox row.
You have an overly complex design (row inside row) and not universal CSS.
Add a section. The row inside is not needed.
Add your own classes to the settings of the column containing the image and to the Image addon settings.
Column settings:

Image Addon settings:

CSS:
.image-col :is(.addon-root-image, .clearfix, .cover-image, .sppb-addon-content, .sppb-addon-single-image-container) {
height: 100%;
}
.cover-image .sppb-addon-single-image-container {
display: flex;
}
.cover-image .sppb-img-responsive {
object-fit: cover;
}
Result
_

After that, you just need to add these classes in other blocks where you need it.