Hi there,
i am not sure thats possible – you would need to ask Elementor support if they provide that feature.
If you want you can use some CSS to help style the default form like this:
/* add background color to password protected content */
.post-password-required {
background-color: #ccc;
}
/* Limit width of content and center text */
.post-password-required .inside-article {
max-width: 1100px;
margin-left: auto;
margin-right: auto;
padding: 40px;
text-align: center;
}
/* style first paragraph text */
.post-password-required .inside-article p:first-child {
font-weight: 700;
font-size: 24px;
}