We've just launched Symmetric on the xDai network with scheduled launches on Celo and then Polygon. I won't go into details of the project but I'll include some links for those interested.
The main benefit to users is that since it's running on xDai then the gas fees are much lower if swapping in and out of WBTC. The issue at the moment is that the WBTC pool is one of the smallest pools, we have to draw in more liquidity to that pool to better support the BTC community.
If you're a liquidity provider looking for a new project and home to support then please check it out. If you're familiar with the xDai network and want to check it out and provide feedback then please do.