It's completely okay if the baby is not burping, sometimes we can't hear the burp sound. If the baby does not show any discomfort then you can continue feeding in sleeping position. I'm feeding like that when my daughter was 50 days old, that's how I made a sleeping pattern for her. This method is followed by moms who are breastfeeding continuously for 3 years plus.

https://www.babychakra.com/community/questions/9jw7ByYvLriIASNvXbJ

hey jyothi... hope this will help https://www.babychakra.com/learn/1608-test