Currently, the LinkedIn Feed widgets are being updated every 48 hours. I’ve just checked both the original and duplicated widgets and see that the latest posts have been pulled there.
However, if the issue with posts update (not appearing in 48 hours after post publishing) occur in the future, please let me know. I’ll be happy to look into this!
Regarding the manual update trigger, this is an interesting idea. We can’t promise that it will be released, but if this request gets more votes, we might consider it in the future