Question about missable missions

[bulldog0890]

so i was checking this list of missable missions and i noticed that 2-1-6 isn't on this list...even though i got the mission by talking to some scientist. or 2-1-5 which i got from talking to a guard near the shinra entrance. were those not really missable? or is this list woefully incomplete?

https://www.thegamer.com/crisis-core-final-fantasy-7-vii-reunion-all-missable-activities-missions-guide/#missions

[Geralt]

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| Chapter 3 |
-----------------

Mission 8-2-1
Chapter 3: Talk to the researcher in the Materia Room on floor 49 (Shinra HQ).

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| Chapter 4 |
-----------------

Mission 2-1-1
Chapter 4: Talk to the man in the SE part of the Fountain area at Sector 8. He is located near the stairs.

Mission 2-1-2
Chapter 4: Talk to the female member of a fanclub in Loveless Street in Sector 8, north from the Fountain.

Mission 7-1-1
Chapter 4: Talk to the SOLDIER 3rd class in the Shinra HQ Briefing Room.

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| Chapter 5 |
-----------------

Mission 2-1-3
Chapter 5: Talk to the girl in Slum Market.

Mission 2-1-4
Chapter 5: Talk to the girl in Slum Street.

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| Chapter 6 |
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Mission 2-1-5
Talk to Shinra Soldier on the 2nd floor of Shinra HQ.

Mission 2-1-6
Talk to the Shinra Researcher in the Vehicle Display Room of Shinra HQ.

Mission 4-3-1
Catch the 1st Wutai Spy

Mission 4-3-2
Catch the 2nd Wutai Spy

Mission 4-3-3
Catch the 3rd Wutai Spy

Mission 4-3-4
Catch the 4th Wutai Spy

Mission 4-3-5
Catch the 5th Wutai Spy

Mission 4-3-6
Catch the 6th Wutai Spy

Mission 6-2-1
Talk to the Shinra Manager and secretary in the main Shinra HQ hall.

[HeeRoTH]

mission 4-3-1 to 4-3-6 you can do minigame wutai spy in chapter 5 but chapter 6 you dont do anything to around the midgard

[bulldog0890]

so theres no missable quests have chapter 6?