Use with userscript extension on iOS. I hate sticky headers.

github-mobile-fix.js

// ==UserScript==
// @name         Fix Github Mobile
// @encoding     utf-8
// @match        *://*.github.com/*
// @compatible   chrome
// @compatible   firefox
// @compatible   opera
// @compatible   safari
// @compatible   edge
// @run-at       document-idle
// ==/UserScript==

(function () {
  "use strict";
  const styles = `
    .pr-toolbar {
      height: auto !important;
      margin-top: -16px !important;
    }
    #repo-content-pjax-container > .clearfix {
      padding-left: 8px !important;
      padding-right: 8px !important;
    }
    .toolbar-shadow {
      display: none !important;
    }
    .js-sticky {
      position: unset !important;
      width: unset !important;
    }
    .js-position-sticky {
      position: unset !important;
    }
    .js-position-sticky.is-placeholder {
      display: none !important;
    }
    .js-sticky.js-sticky-offset-scroll {
      display: none !important;
    }
    .gh-header-shadow {
      display: none !important;
    }
    .data {
      overflow-x: auto;
    }
    .blob-code-inner {
      white-space: pre !important;
    }

    div[data-selector='repos-split-pane-content'] > :last-child {
      margin-left: 0px;
      margin-right: 0px;
    }
    
    main > react-app > div > * {
        padding-left: 4px !important;
        padding-right: 4px !important;
    }
    div:has(>button[data-testid~="date-picker-commits"]) {
      flex-direction: row;
    }
    li div[class~="listviewitem-leadingcontent"] {
        padding-left: 0px !important;
    }
    li div[data-testid~="listview-item-metadata"] {
        padding-right: 0px !important;
    }
    li[class~="listviewitem"] > div > h4 {
      font-size: 0.9rem;
    }
    li[class~="listviewitem"] > div[data-testid~="listview-item-title-container"] > span > button {
      height: 16px !important;
    }
  `;
  const elem = document.createElement("style");
  elem.innerText = styles;
  document.head.appendChild(elem);
})();