Hello,
The height of the “Page title” depends on the font size and the presence of breadcrumbs, without these elements it has a “40px” height (https://prnt.sc/KxcVpc1j7hvP).
1. The first thing you can do is to disable the breadcrumbs in the “Page title” via Theme Settings -> Page title -> turn off the “Show breadcrumbs” option.
https://prnt.sc/CvRjsI7kjPQn
2. The second is to reduce the font size and padding for the page title.
.woocommerce-account .page-title .entry-title {
font-size: 37px;
}
.woocommerce-account .page-title {
padding: 10px 0;
}
https://prnt.sc/XB0vcWO7ef1o
I hope this helps!
Kind Regards