You can add the SKALE EU Chain by adding a new network to MetaMask with the following values:
Network name
Europa SKALE Chain
New RPC URL
https://mainnet.skalenodes.com/v1/elated-tan-skat
Chain ID
2046399126
Currency symbol
sFUEL
Block explorer URL
https://elated-tan-skat.explorer.mainnet.skalenodes.com/