I think the point of the projects are to get you started. Just like most things in life, you only get out what you put in. If you’re only looking to get a certificate from these courses, I’m sure you do so pretty easily, and without much effort.
However, if you’re looking to use these courses to learn real skills and help build your portfolios, you will need to do extra work outside of what you learn from these courses. Personally, I’ve used several other references (books, onince articles, online tutorials, etc.) to help practice some of the concepts taught, as well as learn various new concepts.
Hope this helps, and you continue doing well on your coding and learning journey.