Surveys can be a nice way to make some extra income but as has already been mentioned, it will never be a lot of money.
I don't focus a lot on surveys because I like to spend my time on more profitable things but two I have not yet seen mentioned that I have personally earned some money from is YouGov and an app called Big Token. (Feel free to message me if you would like more details)
I would also like to mention Mystery Shopping as another great way to make some side income. A lot of them you will have to have a car and leave the house to go perform the "shop", however there are also quite a few that are as simple as a phone call to ask specific questions.
Of course, I must add a word of caution as there are lots of scams out there and a lot that don't actually pay you for your work. If you would like more info about the ones I personally use and have actually gotten paid from, just send me a message as I don't want to clutter this post with information that not everyone is looking for.
Food or Grocery delivery is another side income I love doing and will always recommend. I have posted quite a bit about it so just search this community and you will come across some info.
Focus groups are another income source that have been brought up quite a bit on the community. If you want to know more just drop a comment with your question about them and someone who has experience with them I am sure would be happy to share their knowledge.
Last but not least, I love reselling stuff as a way to earn extra income. While I do this by going to thrift stores and department stores to find things cheap that sell for higher online, it is actually something that could be done without leaving your house.
You can buy stuff to resell from online retailers or wholesalers or even auctions and liquidation sites and have it shipped directly to your house.
It is not as simple as that but once you learn the process, it can provide a significant amount of money on the side.