ML Engineer interview prep

So if you are interviewing for a ML Engineer role, there could be 2 types coding interviews. One is the Software Engineering fundamentals and the second one I faced mostly was statistics related (mostly probabilities). So LeetCode and Hackerrank seem to have good practices for the software engineering ones. Where do you get practice for coding on a Stats problems? Note: here I am not talking about the regular ML exercises with a Data set and business problem to solve.