Service receiver not getting ITC

A service provider is experiencing an issue where their service receiver can only claim ITC on 9 out of 10 invoices filed for April 2023. The service receiver is unable to claim ITC on one specific invoice. The primary reason identified is that the invoice entry is not appearing in the service receiver's GSTR-2A. This guide aims to help service providers check their filing from their end to understand why this might be happening.