I've recently started using [Grayjay](<a href="https://grayjay.app/" rel="nofollow noreferrer">https://grayjay.app/</a>). It's not open source, but it is source available and individuals are allowed to modify the code to their liking. I've found that it crashes more often than NewPipe, but the vastly expanded features, more frequent updates, and improved performance fetching subscriptions are all worth it imo.