Likely, either apply diplomatic pressure to the saudis and get them to stop doing these things to migrants or restrict what weapons they can purchase. Or other diplomatic consequences.
The United States is a net oil exporter. What we want to do is keep them from getting nuclear weapons so that when their economy collapsed, terrorist groups don't get H-bombs
Oil has nothing to do with it directly, but more the price of oil. OPEC has a huge influence on the global oil price.
The US is actually a net exporter of oil now, and Saudi Arabia makes up only 7% of the imports we do make. Canada is by far our biggest source of imports at 60%, followed by Mexico at 10%.
This wasn’t true before 2020 which is why you’ve seen Biden making more moves like this. We don’t need them as much now.
We do still maintain a diplomatic alliance with them to have access to the Persian Gulf though.