How do you rebuild the post or reaction count

Thank you for your response. I was doing the test import of reactions from Xenforo to Discourse. The data was correctly imported but not showing up on posts with username and all.

Have managed to do it now.

Used this script

RAILS_ENV=production bundle exec rails runner "

  counts = DiscourseReactions::ReactionUser.group(:reaction_id).count
  
  DiscourseReactions::Reaction.where(id: counts.keys).find_each do |reaction|
    reaction.update_column(:reaction_users_count, counts[reaction.id])
  end

  posts_to_update = Post.where(id: DiscourseReactions::Reaction.select(:post_id).distinct)
  
  posts_to_update.find_each do |post|
    post_reactions = post.reactions.where('reaction_users_count > 0')

    custom_field_value = post_reactions.map do |reaction|
      {
        id: reaction.reaction_value,
        type: reaction.reaction_type,
        count: reaction.reaction_users_count
      }
    end

    if custom_field_value.present?
      post.custom_fields['discourse_reactions_reactions'] = custom_field_value.to_json
    else
      post.custom_fields.delete('discourse_reactions_reactions')
    end
    
    post.save_custom_fields(true)
  end

"