obdev/app/views/devise/confirmations/new.html.erb

<div class="container mt-5">
  <div class="row justify-content-center">
    <div class="col-md-6">
      <h2 class="mb-3 text-center">Resend confirmation instructions</h2>

      <%= form_for(resource, as: resource_name, url: confirmation_path(resource_name), html: { method: :post, class: 'needs-validation', novalidate: true }) do |f| %>
        <%= render "devise/shared/error_messages", resource: resource %>

        <div class="mb-3">
          <%= f.label :email, class: 'form-label' %>
          <%= f.email_field :email, autofocus: true, autocomplete: "email", value: (resource.pending_reconfirmation? ? resource.unconfirmed_email : resource.email), class: 'form-control' %>
        </div>

        <div class="actions text-center">
          <%= f.submit "Resend confirmation instructions", class: 'btn btn-primary' %>
        </div>
      <% end %>

      <%= render "devise/shared/links" %>
    </div>
  </div>
</div>