Normally, MetaMask displays ERC20 standard tokens you own on your account page.
To see your tokens, click on the bar under the Fox icon. Your tokens should be listed.
If your token is not listed automatically, you may add the tokens manually. On your account page, scroll down to find the “Add Token” button
How to use the search bar?
You may follow these steps:
Type in words contained in the token you would like to search. For example, if I would like to look for Hoard Token (Symbol: HOARD), you just type “H” in the bar, and the search bar will return suggestions.
Select token of interest, and click next to proceed. (*When you select a token, the border of the icon will be highlighted in blue)
If the token you search is not among the most popular tokens, the search bar may not return the token you query. In this case, you could add custom token (manually).
The steps to add custom token are as follows:
On the “Add Token” page, click on “Add custom token” to expand the search window.