Thanks for getting back.
Normal case: When I add some text to the shop page on my test site, this is how it appears on the front end:
Adding text on the editor

Link to image: https://snipboard.io/iApWae.jpg
How it’s displayed

Link to image: https://snipboard.io/x1uPyD.jpg
On your end, it could be a plugin/theme conflict causing the text you add via the editor not to display.
For instance, you can check this thread where a plugin conflict was preventing the user’s text from being displayed: https://www.ads-software.com/support/topic/add-text-field-to-shop-page/
In such a case, I would recommend doing a conflict test to identify the cause of the issue. Here is the conflict test guide: https://docs.woocommerce.com/document/how-to-test-for-conflicts/
Keep us posted on what you find.
Thanks.