A year ago I'd have said no, but the pandemic scared the crap out of me in how much I relied on just one source of income so I've spent all my free time over the last year building some bits up. I don't think many of them have been mentioned so far but I do
Print on demand (Redbubble, Merch by Amazon and Etsy using printful integration all do really well. A few year's back I had a more traditional crafty side hussle doing sublimation products, but the production, packaging etc was taking hours each day so this works much better for me even if I make slightly less per item, I don't have to cap myself on how many I sell especially in busy periods like Christmas)
Youtube - 3 channels now, all non facing but I had to teach myself editing to deliver my main job in lockdown so I just kept playing about, 1 is monetised, 1 is very close and one is a long way off.
Amazon KDP - Mostly colouring books so far, a few planners, one niche book I've had up there for about 4 years
Social media templates - I use facebook ads a lot in my main job, so I use it to drum up people for these but I do them very niche specific
Fiverr - again mostly social media templates, but a few banners etc too. I don't love this work so I don't push it at all, but I know some people do very well from it.
Currently working on an online course but that's not released yet, and I'm toying with trying Amazon FBA but I need to do a lot more research on that one.
I'm not good at sticking to one thing as you can tell, but I tend to dip in and out and come back after a few weeks break plus I figure once it's out there given time I'll see what actually works for me and what doesn't. I've tried to set up as passively as I can because I hope at some point my main job is going to ramp up again.