4-25-2022: I received a personal email from Yangshun Tay (one of his links appeared in the original article). He encouraged everyone to check out his free interview prep resources

https://www.techinterviewhandbook.org/

https://www.techinterviewhandbook.org/grind75

You also might want to check out this

https://www.freecodecamp.org/news/coding-interview-preparation/