The current supply of XEP coins is ~ 17.4 billion XEP coins (January 2022). This value is based on the XEP coin economics. You can check the current supply (as of now) using the XEP Block Explorer.
XEP can also be traded as wrapped XEP token on PancakeSwap since October 2021 to make Electra Protocol available to a wider audience. In order to bring XEP to PancakeSwap, the community contributed a part of the premined coins to PancakeSwap. These coins are part of the current supply as well.