GFYYBKJ Diamond Painting Canvas Table Clamp Set, Diamond Painting Canvas Roll Holder, Diamond Art Kits and Craft Accessories for Adults, Gift for DIY Diamond-Painters(Pink)

They sell 3d printed clamps you can use for your desk/work area. If you own a printer or know someone with one, you can make them. You roll the canvas into it as you go. I just bought these ones, I'm still waiting for them but they look like the screws will be long enough for your table too. https://a.co/d/03vWeJC9