Oh ok thanks, i see how to add the account now. Thats great!
One thing to note... Ledger Live will only let you create 1 "empty" account... so if you have "Bitcoin Account #1" with a positive balance and/or history... and then create "Bitcoin Account #2", but it is "unused"... you will not be able to create a "Bitcoin Account #3"
I believe the reason for this is so they could set the "account" level "gap-limit" to 1... so that during a restore, it will only ever lookup 1 extra "account" for history before giving up.
Note that Electrum does not have this restriction, you'll be able to create as many "accounts" as you like by simply modifying the derivation path during wallet setup and specifying wallet "account" value you like.