In order to see your Liberty balance inside your MetaMask wallet you will need to switch to the Liberty network. You can manually add that network by following the steps below.
1. Log into your MetaMask account
2. Click on the top left corner icon to select your network
3. Click +Add network
4. Click Add a network manually
5. Fill in the following details:
Network Name: Liberty
New RPC Url: https://rpc.liberty.blockfabric.net
Chain ID: 1776
Currency Symbol: LBRT
Block Explorer URL: https://explore.mainnet.liberty.blockfabric.net/dashboard
6. Click Save
The Liberty network has now been added to your MetaMask!
You can switch to the Liberty network at anytime by clicking the top left corner icon and selecting Liberty.