If anybody needs a plug and play extension to show product images at all the placed where order is viewed, like

- Admin order view

- Admin new order creation

- Storefront order view

- Order email to customer

Then you may use below extension

https://redchamps.com/product-images-in-sales-order-magento-2-extension.html

Also, if you like to link/hyperlink to product name at all those places then you can use below extension as well

https://redchamps.com/product-links-in-sales-order-magento-2-extension.html