Has anyone’s baby stopped burping?

My boy is 12 weeks and is getting so hard to burp now.

He used to do half way through a bottle and at the end and now he won’t do half way anymore

And from the boob during the day after a feed he will burp but at night he isn’t.

It’s hard at night because if he doesn’t burp he just spend the whole night fussing and spewing in his bed. But I just can get him to burp. I’ll try for 15 minutes and different positions and nope nothing. He used to burp so easily 😞