Yeah, looks like your form is using css from a plugin. The HTML is forcing the element size at 1:
<input size="1" type="text" name="form_fields[name]" id="form-field-name" class="elementor-field elementor-size-sm elementor-field-textual" placeholder="Client Names" required="required" aria-required="true">
size=”1″ is well… small.
The display size is being controlled by the classes: elementor-field elementor-size-sm elementor-field-textual
and these are defined in:
https://clientwebsite1.com/wp-content/plugins/elementor/assets/css/frontend.min.css
So… that file will need to be included on the print page by adding the following to the Top HTML area in the print-o-matic settings:
<link rel='stylesheet' id='elementor-frontend-css' href='https://clientwebsite1.com/wp-content/plugins/elementor/assets/css/frontend.min.css' type='text/css' media='all' />
Good luck!