Hello,
Sorry, but we can’t help you in this case.
When I added some custom php code to show the form then we will have fatal error on page -> http://prntscr.com/x71ft9
Error log shows -> http://prntscr.com/x71hul
Your plugin shows that phone login form for woocommerce_after_customer_login_form and
woocommerce_review_order_before_payment actions
In our off-canvas/dropdown we have default actions from woocommerce -> woocommerce_login_form_end
Regards