A token I own is not showing

Check these, in order:

• The network. Tokens appear only on the network they are on. Switch networks on the Wallet tab.
• The account. Each account has its own balances. Check which account is selected.
• It was filtered. On the main networks, the app hides suspected spam and tokens with unverified contracts.
• You hid it. Go to Manage wallet → Tokens.

To add a token yourself, go to Manage wallet → Tokens → Add token and paste its contract address. Get the address from the project's own site or a block explorer, never from someone who messages you offering help.