I use the crypto.com App, they do give a little interest by parking your cryptos there. Does that count as an income source? The interest is not a lot though.
https://crypto.com/sg/earnAnother relatively passive one is using Brave Browser. They have ads which gives BAT tokens, but I think the number of ads depend which country one is in. Again, the value of BAT is so low now so I am not sure if it is considered "income".
That's all I have. :)