I'm tackling part of the issue of food toxin remediation with my new venture, NeutraOat (neutraoat.com). It's a modified oat fiber supplement that selectively traps BPA, PFAS, and plasticizers in the gut and reduces levels in the blood serum.
The funding for this is tough, though. Everyone loves the idea, but it's difficult to find people to fund R&D to make sure the product actually works over brand building and marketing. I've had to be very scrappy. Hopefully this will change in the future as we build momentum and awareness, but for right now it's tooth and nail.
On the other hand, as other commenters mention, a lot of the studies on microplastics are sloppily done and the conclusions are overreaching. These toxicology studies are certainly not up to the standard of the safety studies that are run on pharmaceuticals. The question is if they need to be in order for us to take action on microplastics. Personally, I think the risk/reward ratio is now clearly in favor of taking action on microplastics, even if I have some problems with the studies and I'm not as confident as the OP.