Puzzle is built for US entities with USD only transactions.
If you can connect a non-USD account to Puzzle, then it will show up in USD (if successful).
Puzzle uses Plaid, so if you live in Canada, for example, then you might be able to connect Canadian accounts via Plaid, but they would all show up as USD (not-converted).
It's not impossible to make this work if most of your spending is in USD or all of your spending is in the single other currency, but we did not design Puzzle for this use case.