@ mention people assigned based on the people column ID

I would like to see the @mention feature updated to allow for @mention the people assigned to a specific people column both at the sub-item and item level. Currently, I’m able to @mention “everyone on this board” “everyone on this item” “everyone at org” - The most useful one is the “everyone on this item” but if I have multiple people columns, I would love to have the control to call out that single person or to call out a person at the item level and a person on the sub-item level with that resolution.