I used UpLearn for maths, I feel it helped me with topics I struggled on, which was most of them. I mainly used it during Covid.
The positives about it is you can pause and rewind, revisit topics when you want. Therefore, you can go at my own pace. They also have practice questions both when you're working on a topic, and separate parts for questions. I don't remember if they mark it, I think they do, and they show you the correct answers as well. I think if you need help you can tutors for help, they have a messaging system on it, from what I recall. Not 100% sure.
The negative side to it is that you don't have anyone to ask for help in person when using it. As it's pre recorded videos, you can't have something explained in a different way if needed.
Its been a few years since I used it, I don't fully remember what it included. Overall, I think UpLearn is useful. There might not be a physical person there to explain and help, you can ask your teacher if need be.