I am still at a point where I have to focus on the knitting, so right now the most I can do while knitting is listening to music that I need to learn, or participating in a conversation that does not take 100% of my brainpower.
EDIT: Revelation. I can also play idle/incremental games while knitting.
Audiobooks. I’ve “read” over a hundred books by now, all while knitting.
There are free ones on librivox.org if you want to try it without spending money to see if it’s something you can do.