Do you mean the creatives? I do outsource the creatives. For ads, I largely automate setting up and maintaining them; like rebalancing and demand generation scripts. But here we are talking good old spreadsheet magic not AI.
I do use some AI but its minimal; most scripts are still just algorithmic, but its easy to build them with Claude; while they are super expensive (couple of hundreds to thousands) if you bought them from some established marketeers (like Mike Rhodes demand gen script).