By default, the platform does not have this option. You can use the following CSS code to remove side padding for mobile.

Please follow the steps below:

1. Go to BuddyBoss > Theme Options

2. Under Custom Codes, enable CSS

3. Append the following:

@media only screen and (max-width:649px) {
    .container {
        padding: 0px;
    }
    .site-content, #bbpress-forums .activity-list.bp-list .activity-item, #buddypress .activity-list.bp-list .activity-item, #buddypress .activity-lists.bp-list .activity-item {
    padding: 0px;
    }
}

4. Save changes.

Note: Any modifications are considered as custom work already. Know more about our Support policy here: https://www.buddyboss.com/support-policy/