Custom Product Options Not Showing On Woocommerce App

We can see that WooCommerce App is not providing support for this.
The options data are stored as order item meta, which is not showing in WooCommerce APP.

We have already reported this to App support. You can also submit ticket on woocommerce app that it is not showing order item meta data.

Is there any other workaround or app we can use in the meantime?

You have to check the details in WordPress Back-end itself. No workaround as of now.
You can vote for this feature in App by going at following topics, so that WooCommerce App team will implement this.
https://ideas.woocommerce.com/forums/133476-woocommerce/suggestions/36732118-include-product-add-ons-checkout-add-ons-order-d?
https://ideas.woocommerce.com/forums/133476-woocommerce/suggestions/38378110-add-in-the-ability-to-see-edit-order-line-meta-d?

As we haven’t heard back from you further, we assume that this issue has been resolved at your end and considering this ticket as closed. Please don’t hesitate to get back to us if you require any further assistance or clarifications from our end in the future. Thanks!