Why is my sticky positioning not working? [duplicate] - html

Question

This question already has answers here:
Why position:sticky is not working when the element is wrapped inside another one?
(1 answer)
Why bottom:0 doesn't work with position:sticky?
(2 answers)
Closed 2 years ago.
I am trying to make a div element sticky on my page. When I use position sticky (and yes, it is inside of a parent element), not only is it not sticky, but I can't position it's top value. The left and right work, but not top or bottom. As the user scrolls down the page I want the div to be visible in it's entirety nearly all the way down. Can I achieve this in CSS? Here is some code:
<main class="main-area">
<header class="header">
<div class="header__logo-area">
<img src="/src/assets/svg/logo.svg" alt="ImmediaDent logo">
</div>
<div class="header__green-plus">
<img src="/src/assets/svg/plus large.svg" alt="Large Green Plus" class="header--green-plus">
</div>
</header>
</main>
<div class="form">
<div class="form__form-section">
This is where the text goes.
</div>
</div>
<section class="next">
</section>
.form {
position: relative;
&__form-section {
position: sticky;
background-color:$colorFormGray;
bottom: 10rem;
top: 10rem;
left:45rem;
height: 40.9375rem + 18.3125rem;
width: 38.5964912%;
border-radius: 20px;
text-align: center;
}
Please let me know if any more code or information is needed. Thank you!