Two days before your event, make another post, and yes put it here as well as in your community.
But make it different to your first post.
You could make a short video, this attracts people more because they can see and feel if they are aligned to you and your energy.
You could write about your event and share some testimonials of previous results.
You could talk about the great outcomes that they will receive by attending your event.
Don’t keep posting the same thing as before as it puts people off straight away, they want something new to read, something that is going to convince them if they dont attend your event there will be FOMO.
And don't forget to always add a simple CTA.