Take home assignments I feel have the second worst signal for any hiring workflow (behind automated leetcode), you give someone free reign to spend too much time working on something useless without seeing how they actually think or approach problems, you only get a solution at the end, and the solution, especially in open ended problems like these has very loose objective measures. If you want a long term hiring process, I'd just stick to a contract project, though personally just do monitored interviews; I know it takes up more of the hiring managers time, but the amount of signal you get from actually talking and interfacing with a dev is pretty useful