When we first create a MetaMask wallet, it has a seed phrase and there is only one wallet address.
By pressing Add Account in MetaMask, however, we can also create additional wallet addresses belonging to the same seed phrase as the first.
If I have to recover this same MetaMask set-up on a new computer using its seed phrase, only the first wallet generated will appear at first I think, and the rest are hidden for some reason. How to fully recover all secondary accounts/wallets that were added after the first?
EDIT:
This is not a question about how to re-import the (invisible) ERC-20 tokens that are in a wallet. It's a question about how to recover all wallet addresses belonging to a seed phrase
Best Answer
This official Metamask page explains that you need to press "create account" as if you were creating a new account 2, and the resulting account will actually be your existing account 2. Weird, but that's how it is. Also, there seems to be no way to automatically import all the tokens that were there in your old wallet install. So, unless you remember what tokens you had, they're as good as gone, this is such a big flaw! Thankfully, my old wallet install is still there on my old computer, and I can still make a note of which tokens I need to import on the new install.
A way to find out which tokens are there in your account is to click the account explorer which will open something like Etherscan.com or BSCscan.com and show you all your transactions. The tokens can be found in the other tab on this site. The best site IMO to quickly add tokens to Metamask is CoinMarketCap, it has a nice button next to the token address that says "add to Metamask".