With Uniswap V4 still being in it's open-code phase we are still not yet ready for a full launch on testnets or mainnets. However, we are still able to set up our environment's locally. We have multiple options available for setting up local environments, both on Foundry and Hardhat. We've been lucky enough that the Hardhat team has also include EIP-1153 functionality through an upgrade which makes it easy to work with Uniswap V4. As for Foundry we've had community members put together extensive guides to help you get started. As testnets become live we'll keep adding more examples here!