GSTR 2B is not showing.

If your supplier is a monthly filer and has not filed a return before the 11th then this invoice will not come in GSTR-2B. If your supplier is a quarterly filer and has not filed a return before the 13th then this invoice will not come in GSTR-2B. In both cases, it is the supplier's mistake. You need to ask the supplier to file timely. This article will be helpful for understanding GSTR-2B in-depth https://bit.ly/3aOJcGb