Use Last Updated column in date automations

Is there a way to set an automation to say “if nothing has been updated on this item for 3 days, notify someone?” I’m trying to use a Last Updated column to do it and I don’t see how. The alternative would be to create a date column having the info when the item was last updated, but how do I make one of those without using an automation When Column Changes Set Last Updated to Today for every column on the board (there are 100+)? Thanks in advance for your ideas. Seems like there should be a simple solution, but I’m just not thinking of it.

100% This is a massive oversight and limitation…

I agree - can this be added as a feature?