If you are here, thank you very much for your attention.

I have recently shared product keys, however I verify them first with this site's own tools, some work and others do not, however they come out as valid and I do not understand them. Am I missing something?

I am new and my intention is to give thanks in some way by sharing and I want to try to do it well.

Examples of product keys that are valid but do not work even if they say they do:

Key: RX63Y-6NRYH-QTD6Y-H6VK9-MHB9Q
Description: Office19_ProPlus2019VL_MAK_AE
Sub type: X21-74156
Remaining: 500
Time: 5/7/2024 4:53:58 AM (GMT+7)

Key: BXDNY-VGK47-T4Y8P-742FF-9W4XQ
Description: Office19_ProPlus2019VL_MAK_AE
Sub type: X21-74156
Remaining: 9
Time: 5/7/2024 4:53:58 AM (GMT+7)

Key: RNB7V-P6VW8-Q36R2-7W2MT-D3YDD
Description: Office19_ProPlus2019VL_MAK_AE
Sub type: X21-74156
Remaining: 500
Time: 5/7/2024 4:53:58 AM (GMT+7)

Key: YR992-N4XP3-4P23P-QC4R2-4RJKQ
Description: Office19_ProPlus2019VL_MAK_AE
Sub type: X21-74156
Remaining: 3
Time: 5/7/2024 4:53:58 AM (GMT+7)

Key: QBQ3Q-2N4DG-8G8QT-K8YHB-7MKG3
Description: Office19_ProPlus2019VL_MAK_AE
Sub type: X21-74156
Remaining: 15
Time: 5/7/2024 4:53:59 AM (GMT+7)

Key: YB9RP-CN47P-HHFQ4-FPCXQ-Y4JKQ
Description: Office19_ProPlus2019VL_MAK_AE
Sub type: X21-74156
Remaining: 3
Time: 5/7/2024 4:53:59 AM (GMT+7)

Key: 4N9TC-RBBDV-8HXK7-7WWWH-2R6T3
Description: Office19_ProPlus2019VL_MAK_AE
Sub type: X21-74156
Remaining: 15
Time: 5/7/2024 4:53:59 AM (GMT+7)

Key: RNPX3-4HV26-GJ94K-BY9Y9-V233D
Description: Office19_ProPlus2019VL_MAK_AE
Sub type: X21-74156
Remaining: 6
Time: 5/7/2024 4:53:59 AM (GMT+7)

Key: CT633-NPKK9-2FR7T-JD73H-94VQD
Description: Office19_ProPlus2019VL_MAK_AE
Sub type: X21-74156
Remaining: 30
Time: 5/7/2024 4:53:59 AM (GMT+7)

Key: NK6K4-7D8WT-K63Q6-DTFXB-88HQD
Description: Office19_ProPlus2019VL_MAK_AE
Sub type: X21-74156
Remaining: 500
Time: 5/7/2024 4:54:00 AM (GMT+7)