Testing the merger of the PoW and PoS network in the ether network with the participation of the node clients Teku, Lighthouse, Nimbus and Prysm (eth 2.0 side) and geth, Besu and Nethermind (eth1 side). The test simulation of the merge started normally for a certain number of blocks, but quickly disintegrated into numerous forks. The symbolic name of the simulation is Steklo.

According to Diederik Loerakker, developer of eth 2: "The test network is now in a rather unstable state, and it looks more like a developer tool for debugging node clients. In the coming weeks, we will launch more user-oriented test networks as soon as the situation stabilizes sufficiently."  https://www.trustnodes.com/2021/05/01/ethereum-2-0-merger-devnet-completes-successfully