Re: who hands out the wedding invites?
Desis esp of the older generation have a protocol about this. Some families being stricter than usual. The rules are the more important you are (e.g. already married daughter’s in laws etc. the first you will be to get the invites and the parents will go to give it, provided that they live in the same city of course). The lowest on the ladder get it by mail. I have seen people not going to wedding just because the parents did not come themselves but sent a teenage or adult child instead with the invitation.
My family does not follow the protocol of rankings within the family, but we do call close relatives and near and dear ones to let them know when the match has been arranged.