I opened a Soapbox Fediverse site to play with. Learned a couple things doing that, but when I installed it, certain features were not working the way they should under the soapbox-config settings (I think this was all under the newer Soapbox3 front-end). None of the buttons on the front-end worked. The fix was to just type it out in the Advanced: Edit raw JSON data section. Once that was filled out everything worked like normal. Here’s how my settings look. You can copy this and change it around yourself; put your own info in it.

{
  "cryptoAddresses": [
    {
      "address": "bc1qvjz2avgcyuh23s72dr3zgc3sltkgje7v35c4h9",
      "note": "Send some sats!",
      "ticker": "btc"
    },
    {
      "address": "t1g3kiDojaTyNBHCEc67B46q3cEJSJ92113",
      "note": "",
      "ticker": "zec"
    }
  ],
  "defaultSettings": {
    "themeMode": "dark"
  },
  "copyright": "♥2022. Copying is an act of love. Please copy and share.",
  "logo": "https://clyez.city/media/c67b745d-0097-4b8d-9c74-39d5c5e0bd3a/Rappy%20white.svg",
  "greentext": true,
  "cryptoDonatePanel": {
    "limit": 2
  },
  "promoPanel": {
    "items": [
      {
        "icon": "comment",
        "text": "Session",
        "textLocales": {},
        "url": "https://getsession.org/"
      },
      {
        "icon": "envelope-open",
        "text": "Protonmail",
        "textLocales": {},
        "url": "https://pr.tn/ref/CY79FTJWS3FG"
      },
      {
        "icon": "eye-slash",
        "text": "Privacy Redirect Addon",
        "textLocales": {},
        "url": "https://addons.mozilla.org/en-US/firefox/addon/privacy-redirect/"
      }
    ]
  },
  "navlinks": {
    "homeFooter": [
      {
        "title": "Need a Fediverse account?",
        "url": "https://jointhefedi.com/"
      }
    ]
  },
  "accentColor": "#9d954b",
  "brandColor": "#756573",
  "allowedEmoji": [
    "?",
    "?",
    "?",
    "?",
    "?",
    "?"
  ]
}

The only thing that continued not to work was the icon picker for the Promo Panel. In which case you can add that yourself in the JSON data section too. Just use an icon name from this site. For example I wanted the slashed eye icon so I had to add

 "icon": "eye-slash",

On the Soapbox front-end you can choose your own emoji reactions too. So just add and remove emoji in allowed emoji. I added the pinched fingers and skull ones.

"allowedEmoji": [
    "?",
    "?",
    "?",
    "?",
    "?",
    "?"
  ]

The guy who actually works on this, Alex, works his butt off and I think at the moment he can only take crypto donations. Check out his profile for crypto addresses and maybe send him some sats as thanks if you’re using his software. https://gleasonator.com/@alex