Here is a little tip for adding your latest Groups posts to your Index (Home) page.
First, this assumes that you are using Orca on your site. No need to go any further here unless you are.
Now for the fun:
Open your admin panel, then go to your "Builders" section and select "Page Builder".
Click "HomePage" and then add a new RSS block wherever you want your Groups Posts to appear.
Open and Edit your new RSS Block, naming it whatever suits your needs, (I named mine "Newest Group Posts".
In the RSS Feed URL block, insert THIS: {SiteUrl}groups/orca/?action=rss_all
Then you can select how many posts should be shown by just entering the #.
Save Your New Block and if necessary, jiggle it around on the page to update your cache.
This should give you a nice new block containing your new Group Posts.