In the general election, there were 10 candidates that got > 10,000 votes. Lightfoot got 17% of the vote, concentrated in the rich white northside along the lake. Prekwinkle (the other person in this article) got 16% of the vote, concentrated in the rich white and black south side along the lake.
The poor areas of the city voted for a variety of black and Hispanic men. The most interesting of those men was Willie Wilson, who literally went to churches and handed out cash as people left Sunday services. The Trump-era FEC investigated and declared that handing out cash does not count as trying to buy votes, so obviously this Chicago program is A-OK regardless of whether any recipients vote for her!
So basically, hardly anyone voted for her. About 6% of registered voters voted for her, and that made her the top vote getter. In the special election, she did better (24% of registered voters!) but basically it was just people voting for “anyone but Prekwinkle”. And, well, elections have consequences. LOL