BuddyPress.org

@oaz on localhost it might have issues
like this
Refused to display ‘https://buddypress.org/support/topic/not-embedding-in-groups/embed/#?secret=hteHTpJ8oj’ in a frame because it set ‘X-Frame-Options’ to ‘sameorigin’.

but at a live site with https, it will fine for both profile and group activity.
eg you can check here…[Read more]

@oaz You can try

.groups-meta.action button.group-button.leave-group.button {
display: none;
}