How to Ask for an Academic LOR Without a Strong Professor Relationship?

I graduated from undergrad in 2024 and decided I wanted to pursue law school during the summer of 2025. I was a business major, so most of my classes were online; therefore, I did not develop a personal connection with any of my professors. I also did not think I would need to, since I was not thinking of pursuing higher education after I graduated. I plan on getting a letter of recommendation from my supervisor, but I also need one from an undergraduate professor. How do I go about asking my professors for a letter of recommendation when I did not establish a connection with them?