tbh you can make a loom out of just about anything. you just need something to hold the warp and something to separate the sheds, a shuttle, and something to beat the weft with (like a really long shuttle or a separate stick)
Below is a picture of my great grandmother weaving a chinchorro (hammock). Wayuu weaving is a little different than what you're probably used to, but the basic thing to understand is the same. There's a bar at the top and a bar at the bottom, she's using her hands and small balls of yarn to wind the weft through, and tie warps together to make patterned gaps. No shuttle is involved.
But if you wanted to you could easily add pickup bars (basically a long stick and shuttles to this type of setup and weave that way. It'd basically be a tapestry loom setup, but tbh you can weave just about anything, you just have to get creative with how you manage the sheds.
I'd look up backstrap looms and translate the way the different bars are set in place for this kind of a setup. All you'd need is dowels or sticks of some sort for it. You could figure out a mini one on a box or a picture frame. Abuela had a floor to ceiling setup on one of the walls that was just basically a frame.
I wish I had photos of some of the chinchorros she made, they were beautiful. My uncle has a video somewhere of her weaving one with a horse on it and the artistry to it was absolutely gorgeous. I wish I'd gotten the chance to learn from her tbh, she was a brilliant artist from the work I've been able to see. I think it was cos of her that I inherited my love of weaving and textiles so much.