So, yes, there are sneakers made by gum and canvas (like Converse) but these are not the best pick for everything.
I’m skeptical on leather alternatives for shoes, “fake leather” has generally low durability and I’m not strictly interested in cloning the aesthetic; when it comes to boots/shoes there are very poor alternative to a refurbished leather pair: great durability and flexibility, traditional models can be resoled, great looking over time when well maintained, the ecologic aspect, etc. Also the price: new tech-fibers are generally very expensive with dubitabile quality, while leather can be very cheap considering what you pay for.
What do you think about it? What’s your daily use? I could edit this OP to share products you found interesting.
(edit) An user suggests vegetarian-shoes.co.uk
You could check out cork leather shoes.
I’m on the canvas train for shoes (really good against stinky feet), so I haven’t tried any cork shoes, but I’m really happy with my belt and wallet out of cork leather.
The wallet has a few specks where the undyed cork shimmers through, which I’ve been meaning to color in with a sharpie.
But yeah, the belt in particular is great. At this point, it must’ve surpassed the lifetime of any other belt I’ve had so far and it still looks perfectly fine.