MetaMask users can hold, send, receive, and swap Stellar (XLM), trustline assets, and Soroban tokens alongside assets on other supported blockchains.

From the articleMetaMask makes Stellar a default network, bringing global payments into the Open Money platformAlso in MetaMask Makes Stellar a Default Network on Mobile and Extension, Stellar joins MetaMask: What the wallet update brings to XLM users - AMBCrypto