Hi I'm having my 21st birthday party coming up with about 30 people invited. Since I'm inviting multiple different friend groups I sent my invitation to 3 different group chats on instagram, and some individually. Whilst a lot of people did accept my invitation in the group chats I noticed that a lot didn't respond as well. I also noticed that I had a higher response rate and acceptance from the individual invitations rather than the group one's. I have asked my parents and apparently sending out an individual invitation is much better as it feels more personal - and it's bad social etiquette, and apparently it was rude.

Now it's too late and it's already been sent. I also don't know if I am supposed to assume if the people who did not respond are not going as well. So in general I am wondering was it bad social etiquette to send my birthday invites to a group chat? And is there anything I can do now to fix this? Thanks!