Yes but not immediately for now only usd pairs will be available for trading, i guess this decision was mostly to keep the price stable to some extent, btc and eth pairs will be added on a latter date, between trading will be live soon lets see how it goes.
Maybe because during more than 7 months this year, altcoins have more opportunites for traders in the USD pairs, while there are very limited waves for traders in BTC pairs. Soon, Temtum team might ask for adding more pairs for TEM, but for now I think that pair is good enough for the young project.