Got info from a senior support person
Yes, the cashback will expire on the month of March, 2024 as we will introduce a new cashback on the month of April 1st, 2024. In the month before, you need to credit £1,500 into your Chase current or savings account (internal transfers excluded) and have 2 or more active direct debits across any of your Chase current account. Next month, you can earn 1% cashback on eligible debit card spend, up to £25 p/m and with no fixed end date on the offer.