The welcome bonus promotion (promotional bonus for 1st deposit) does not expire, until you choose the promotion when you make a deposit.
Normally the deposit bonus is available between 48 and 72 hours (always check the conditions). During the duration of the promotion, you can benefit from the promotion at any time. Any deposit after the duration of the promotion is not qualifier.
You can also check the conditions by selecting “More information” when depositing.
For example, if you receive a campaign on 08/02/2022 at 09:00, and in the email you indicate that you can benefit from the bonus in the next 48 hours - it will expire on 10/02/2022 at 09:00.