Keep some patience bro, I know we all are credit card enthusiast here but we should accept that all banks are not like axis or sbi , ekdum quick action. It is a co branded card, also kiwi app is also new, so if your card is approved then wait for four to five days, you will get communication from either kiwi or yes bank, I my self got to know that my card is approved on Saturday and got it linked on Wednesday.