Hi LisaA,

Thanks for reaching to us and appreciate your patience.

1. Please switch to Child theme and I will take a look at your issues.

2. Please add the following Custom CSS code to Theme Settings > Custom CSS > Global Custom CSS:

.whb-header:not(.whb-sticked) .whb-general-header {
    background-color: transparent;
}

3. There are options to change height for normal and sticky header https://prnt.sc/elMk6bISuL60 https://prnt.sc/ZK0C2G1w587D

Regards,