I know some people praise the lack of an algorithm because it makes them spend less time on YouTube but I don’t have that problem anyway. Almost all videos I’ve watched on YouTube. I found through the homepage. The lack of it makes the alternatives useless for me. I’d even maybe be fine with something that takes all the watch next recommendations of the videos in the subscriptions page and jumbles them together as “recommendations”.
Invidious and Newpipe do have watch next recommendations that aren’t only subscribed channels, so there’s a bit of discovery there, but no recommended type page where it aggregates those listings. As others have said, that would require tracking algorithms.
Most of it could be client side though