Publishing low content books like journal, monthly planner,etc.,in kdp. Amazon,. If you have valuable information to share to the world you can write a book and publish it. There are so may ways one can earn passive income.
If you have the hobby of taking photos or drawing any creative designs you can put those designs under print on demand products like mugs,T-shirts, scarves , cellphone covers, etc.,on some websites like teespring, redbubble respectively.
If you are good at finding and estimating value of digital products you can buy them for fair price ,refine them and sell them for a good money to a website (sorry I don't remember the name).
So far I have given you some ideas people are earning money during the pandemic lockdown .Few people who were doing such hobbies to kill time could sustain their household expenses managing the crisis, while many were struggling to meet their ends due to unexpected closure of work space.
There are many ways to earn passive income we can find it in search engines like Google and many people have shared their experience on doing that, so l would recommend you to follow these people who have made it and not the people who just advice you.
And last but not least l would like to request you not to follow people who recommend you to grow your money through shares or digital money
.As it involves calculated risks which many of us are not lucky enough to understand as a concept and it's little tricky at this times so please don't fall for it.