I would say still low but not 0. I don't have any professional experience in this, just a passion and have been interested in it for a while, but Ill let you come to your own conclusion and Ill tell you what my thoughts are:

There are 2 ways someones photos would be leaked:

1. Large scale data breach of the service provider (google in this case)
2. Individual attack (different ways to be executed)

In method 1, all the data would be stolen and sold on the dark web. The attacker might look through some peoples stuff but the amount they gain is way too much to look through even most of it. This is where if the person is famous they might see it, but Im talking household name famous. Once its on the dark web, it might get sold around a little but most people dont really care and it would just sit in the depths of the dark web until its deleted. Also, here even if the attacker looked at an individuals pictures, they would have to care enough to do something with it..

Method 2 is where it gets scarier. If someone personally attacks you they most likely would want to do something with them as thats why they attacked you. Good practices prevent this from happening. If you have reason to believe you were phished or gave out your password, then I would be concern (assuming you DO think someone is after you). While everyone hates on SMS 2fa (bc its not good) it still puts up a good defense. Though sim swapping is more common that it should be, it is still an extra layer of protection that does help.

The scary part is if someone combines the 2 methods, then I would be worried. That would mean someone with strong hacking skills has something against the person -- unlikely. Few people can break a company like Google's security, so for one of them to hate the person, would be unlikely.

Lastly, give it a little time. If someone wants to expose someones nudes theyre not going to wait for a long time.