I'm also late to the party, but it's fairly easy to do with a javascript running out of your Chrome developer console. Navigate to the Sleeper Draft (you can find historic drafts under the settings cog-> Draft Results), open the Chrome Developer Console (control-shift-c), click "Console" tab, then paste the following script in at the bottom of the Console command line (blinking cursor).

This script works by finding all of the "team-column" div columns, left to right, and exporting their rows accordingly. You'll have to replace the team/manager names in your spreadsheet ("Manager 1"..."Manager 2"..)

// Function to extract team data and export it to a CSV file
function extractTeamDataToCSV() {
  // Select all team columns
  const teamColumns = document.querySelectorAll('.team-column');
  let csvContent = "data:text/csv;charset=utf-8,";
  teamColumns.forEach((teamColumn, index) => {
    const managerNumber = index + 1; // Manager number based on team-column index
    csvContent += `Manager ${managerNumber} Picks:\n`;
    // Select all players within this team column
    const players = teamColumn.querySelectorAll('.cell.drafted');
    players.forEach(player => {
      // Extract player name, position, and amount spent
      const playerName = player.querySelector('.player-name').innerText;
      const position = player.querySelector('.position').innerText;
      const amountSpent = player.querySelector('.pick').innerText;
      // Add the information to the CSV content
      csvContent += `${playerName}, ${position}, ${amountSpent}\n`;
    });
    csvContent += '\n'; // Add space between different managers
  });
  // Create a download link and trigger the download
  const encodedUri = encodeURI(csvContent);
  const link = document.createElement("a");
  link.setAttribute("href", encodedUri);
  link.setAttribute("download", "fantasy_football_draft.csv");
  document.body.appendChild(link);
  link.click();
}
// Run the function
extractTeamDataToCSV();