- First, select the HTML element from the form and drag it onto the form. Then, click on the settings of that HTML element.

- Navigate to 'Display,' and in 'Content,' paste this code. You can change the size where it mentions '20px' according to your preference.
<style>
label.col-form-label {
font-size: 20px !important;
} </style>

- And save the changes.