Generally speaking, wedding invitations usually include information such as the time and place of the wedding and the contact information of the inviter, but do not include information about congratulations and gifts. Therefore, unless otherwise specified in the invitation, friends of the same company can't see the information of greetings and gifts.

In addition, wedding invitations are usually sent to the wedding site only by the bride and groom or their family and friends, and will only be opened on the wedding day. Therefore, even if you see other people's greetings and gifts at the wedding scene, it doesn't mean that they knew this information before.