Hi @JoeY29
Thank you for your feedback on this. You are correct that you are not able to send abandoned cart recovery emails manually through the admin. If the customer has signed up for email communications and you have their email address in the order details then you can send an email to them directly.
You can learn more about how this automated workflow integrates with your store through our Help Center here: Shopify Help Center | Opt in to the new abandoned checkout automation.
I would love to know more about your previous workflow and why you prefer to send the abandoned cart emails manually instead of having them automated by the system.