When creating a LinkedIn post in HubSpot, the majority of the time I am unable to tag an account (individual or company). This means I either need to forgo HubSpot and set it up in LinkedIn, or immediately edit the post once it is live.
In the example below, I am trying to tag myself, the owner of the account, a follower of the company, and am unable to do so.
This seems like a standard function of the tool that isn’t working, at least for LinkedIn. It would be great if HubSpot investigated a fix.
Hi @SJonas and @GGordon, I’d like to thank you for sharing your valuable feedback! This means a lot to us.
I have shared it internally to bring more visibility to it.
I’ve noticed a similar idea already present in our Ideas Forum: Tagging People for LinkedIn Posts in HubSpot.
To contribute, you can upvote the existing idea and share more details about your specific use case in the comments.
Please let me know if there is anything else I can help with. I’ll be delighted to do so!
Thank you for your suggestion and have a lovely day! 
Bérangère