Checkbox not showing

I saw another ticket that said comment forms need to have the default id=commentform, which we do have.I copied the code below in our comments.php. The “Enable default checkbox” set to yes in stcr plugin. Cleared all the caches. The checkbox still doesn’t show.

<?php
comment_form(
	[
		'id_form'            => 'commentform',
		'comment_field'      => '<p class="comment-form-comment"><label for="comment">' . __( 'Join the discussion', 'text-domain' ) . '</label><textarea id="comment" name="comment" cols="45" rows="5" style="height: 100px;" placeholder="' . __( 'Join the discussion!', 'text-domain' ) . '" aria-required="true"></textarea></p>',
		'fields'             => [
			'author' => '<p class="comment-form-author"><label for="author">' . __( 'Display Name', 'text-domain' ) . '</label> ' .
				( $req ? '<span class="required">*</span>' : '' ) .
				'<input id="author" name="author" type="text" value="' . esc_attr( $commenter['comment_author'] ) . '" size="30" placeholder="' . __( 'Display Name', 'text-domain' ) . '"' . $aria_req . ' /></p>',
			'email'  => '<p class="comment-form-email"><label for="email">' . __( 'Email Address (Not Shown Publicly)', 'text-domain' ) . '</label> ' .
				( $req ? '<span class="required">*</span>' : '' ) .
				'<input id="email" name="email" type="email" value="' . esc_attr( $commenter['comment_author_email'] ) . '" size="30" placeholder="' . __( 'Email (Not Shown Publicly)', 'text-domain' ) . '"' . $aria_req . ' /></p>',
		],
	]
);
?>

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