Currently it can potentially scrape only from data you published that are directly linked to your name, such as Twitter conversations.

Post shared on Facebook and Instagram should be safe.

LinkedIn I am not sure, tbh.

Public blogs are a problem… But in general, it can access less data than a research engine.

If you are worried about your data and you are in Europe, you can use the “right to be forgotten”, asking websites to remove your data. Outside of Europe, companies are not forced to do so, afaik, but many do it