Have a look at this tutorial: https://help.shopify.com/themes/customization/products/get-customization-information-for-products
This will allow your customers to add the custom text. In the Shopify order admin, you will see the text entered.
If it is helpful then mark as accept the solution.
Hey @zoeandrie, I hope you are doing good!
Here's a solution, you can check out this thread: https://community.shopify.com/c/Shopify-Design/Product-pages-Get-customization-information-for-produ...
Also, do check out the all-in-one Shopify marketing app AiTrillion.