I recently saw an article or video on social media about plant-based 'leather' being made from pineapple leaves. Looking up that process specifically might give you some ideas.
Here are a couple articles I pulled up on that topic:
https://collectively.org/en/article/can-you-tell-that-this-leather-is-made-from-pineapples/
https://www.theguardian.com/business/2014/dec/21/wearable-pineapple-leather-alternative
I hope this was useful!
