Here is a response from Google to my query.
Hi Keith,
Thank you for contacting gTech Customer Experience in regards to your query related to the Merchant center account:.
I apologize for the inconvenience that you are facing. I understand that you are concerned with the issue of feed labels. I will be more than happy to assist you in this case.
I understand that you are trying to add a feed label on the existing feed (My First Feed June 2024). post checking I can see that there is no option to edit the feed label as now.
Here we recommend you to please delete this feed and then you can add a new feed and at the time of creating the feed you should be able to add the feed label. Please make sure that you are adding the correct feed label at the time of creating the new feed.
Please be advised that the feed label can only be added at the time of creation. Once the feed label is added on the feed, it can’t be edited.
We appreciate your continued patience and cooperation. I hope the provided information is helpful. If you have any further questions, please reply to this email and I will be happy to assist you.
Thank you for choosing gTech Customer Experience. We appreciate your relationship with us.