When trying to retrieve your Project Sekai account, you might get a second email asking for more information. These are the bullet points covered there, as given to me by a user asking me for support. Compiling this took a while so I thought I might as well archive it.
I tried to explain what I can, but if you're confused about what something here might be referring to use the faq
◇「想いのカケラ」の所持数:Number of "Feeling Fragments" you have (the gem currency you get when your seals on a gacha expire, as well as after virtual lives)

◇達成した「キャラクター」ミッション Character missions you've completed
例)「初音ミク」をリーダーにして10回ライブしよう、「星乃 一歌」スタンプを2種類入手しよう (use miku as your leader 10 times, get 2 stamps of ichika, etc)
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List
List of possible numbers (in JP) (Some characters have more/less that are possible for various reasons)
Use Google Translate or another OCR to get the names for these from the first image if you can't type them
◇「ライブ」ミッションの獲得ライブP:How many live mission points you had (the "battle pass" style thing where you get points and rewards from playing songs)

◇達成した「定常」ミッション Regular Missions you've completed
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◇達成した「称号/アチーブメント」ミッション Achievement Missions you've completed (the ones that give badges)
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Links to a majority of both types of missions above
◇メインユニットに編成しているメンバー以外でレベルをMAXにしたメンバーのレアリティと正式名称 Rarity and official names for cards with their levels maxed, that weren't in your main unit
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Use sekai.best for names, warning that there may be unreleased content shown if you check around an ingame or gacha update
On sekai.best, go to Settings in the top-right corner and change Game Content Display Mode at the bottom to "Original" or "Show Both" to get the Japanese names

Formatting like 4☆ [夜明け前の語らい] 星乃 一歌 should be fine
◇所持している「アナザーボーカルカード」のメンバー名 Members that you own "Another Vocal Cards" for
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Obtained through levelling Character Rank and exchanging tickets from events (example) for a specific member
◇メインユニットに編成しているメンバー以外でマスターランクを上げているメンバー名とランク Member Names and Master Ranks (the triangle in the bottom left of the card) of 5 cards that weren't in your main unit (IMO I would avoid using 1☆s for this because many people have their MR maxed, try to list event 2☆s or higher rarities if you've ranked them up)
・メンバー名:Member Name:
・ランク:Rank:
・メンバー名:
・ランク:
・メンバー名:
・ランク:
◇最後にプレイしたひとりでライブの楽曲名と難易度 The title and difficulty of the last song you played in Solo Live
・楽曲名:Title:
・難易度:Difficulty:
◇最後にプレイしたチャレンジライブの楽曲名と難易度 The title and difficulty of the last song you played in Challenge Live (the character missions you can do once a day)
・楽曲名:Title:
・難易度:Difficulty:
Use sekai.best, same spoiler warning listed above
◇編成しているユニットの編成名 Any unit names you've applied (i.e. changing ユニット1 to "Main" or something similar)
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translated by PSP (@25ji_miku/@amalgamidol on twitter) translations are approximate, but accurate enough to answer all the questions above