Thanks a lot.

Please use the CSS code below: 

div#wpdcom .wpdiscuz-textarea-wrap  p:empty, #wpd-editor-wraper-0_0 > p, #wpdcom .wpd-form-row .wpd-form-col-left .wpdiscuz-item br, .wc-field-submit label.wpd_label br {
    display: none !important; 
}
#wpdcom .wpd-form-row .wpd-form-col-left .wpdiscuz-item p{
    margin: 0 !important; 
}
#wpdcom .wc-field-submit p {
    display: flex !important;
    align-items: flex-start;
    margin: 0;
    justify-content: center;
}
#wpdcom.wpdiscuz_unauth .wc-field-submit {
    padding-top: 0;
}

Put the code in the "Custom CSS code" textarea, located in the Dashboard > wpDiscuz > Settings > Styles & Colors admin page. 

Don't forget to delete the caches before checking.

https://getanycourse.com/hello-world/

please check the middle section of this page

you will see the wpdiscuz comment form there.

waiting for your response.

Thanks.

Please provide the URL where we can see the wpDiscuz comment form. 

This is just a small CSS conflict with the theme or other plugins.

already input this shortcode but not displaying correctly 

please see this link-

https://getanycourse.com/hello-world/

please guide me.

Thanks.

Then you should use the shortcode below: 

<!-- wp:post-comments /-->

It's a Block theme.

your above solution not working for me.

waiting for your response.

Thanks.

Please check out the points mentioned in this doc: https://wpdiscuz.com/docs/wpdiscuz-7/getting-started/missing-comment-form/

If it's a builder theme use the shortcode below:

<!-- wp:post-comments /-->