Вот что есть
import telebot
print(telebot.util.update_types)
# ['message', 'edited_message', 'channel_post', 'edited_channel_post', 'inline_query', 'chosen_inline_result', 'callback_query', 'shipping_query', 'pre_checkout_query', 'poll', 'poll_answer', 'my_chat_member', 'chat_member', 'chat_join_request', 'message_reaction', 'message_reaction_count', 'chat_boost', 'removed_chat_boost']
print(telebot.util.content_type_media)
# ['text', 'animation', 'audio', 'document', 'photo', 'sticker', 'story', 'video', 'video_note', 'voice', 'contact', 'dice', 'game', 'poll', 'venue', 'location', 'invoice', 'successful_payment', 'connected_website', 'passport_data', 'web_app_data']
print(telebot.util.content_type_service)
# ['new_chat_members', 'left_chat_member', 'new_chat_title', 'new_chat_photo', 'delete_chat_photo', 'group_chat_created', 'supergroup_chat_created', 'channel_chat_created', 'message_auto_delete_timer_changed', 'migrate_to_chat_id', 'migrate_from_chat_id', 'pinned_message', 'users_shared', 'chat_shared', 'write_access_allowed', 'proximity_alert_triggered', 'forum_topic_created', 'forum_topic_edited', 'forum_topic_closed', 'forum_topic_reopened', 'general_forum_topic_hidden', 'general_forum_topic_unhidden', 'giveaway_created', 'giveaway', 'giveaway_winners', 'giveaway_completed', 'video_chat_scheduled', 'video_chat_started', 'video_chat_ended', 'video_chat_participants_invited']