485 pending中F1身分失效 - 移民

想請教大家一個問題
485已經pending一年多
當初申請是用F1身分申請的
因為碩班提早畢業現在已經沒有F1身分了
今天收到USCIS的補件通知 說要就學的證明
但485 pending不是就可以合法居留了嗎？
為什麼還需要我提出證明？
若我提出的證明顯示已經畢業會有什麼影響嗎？
謝謝～

Submit evidence to establish your school enrollment and attendance. The
record shows that
your last lawful admission to the U.S. was on 8/8/2021. Submit evidence to
establish you maintained
your F-1 status by providing evidence of your school enrollment and
attendance from the date of your
entry into the U.S. to the present. Submit the following to establish your
enrollment and attendance
during this period

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