I was today years old when I realized this was a (hidden) feature on LinkedIn. Seems like a missed opportunity to not utilize this feature.

Would be great to be able to receive prompts that either help to inspire content for a LinkedIn newsletter, or a scheduling feature to post articles as part of a LI newsletter series.

I agree. It´s one of the best (hidden) features on LinkedIn at the moment.

I would say this will be a great feature, because it's not that much trendy yet, but if people would know about this value everyone will start using it.