@nvdaes for now I have accepted your suggestion.
But have not investigated the error. Any idea why the install date is not available in this tab? Probably because it's not the same type of add-on in this tab.

I may not have time to investigate soon. Either we merge this as is, or I'll investigate later to add this information if we feel it's useful in this tab too.

• PASS: Translation comments check.
• PASS: License check.
• PASS: Unit tests.
• FAIL: System tests (tags: installer NVDA). See test results for more information.
• Build (for testing PR): https://ci.appveyor.com/api/buildjobs/499xx3ug1dc5kgcb/artifacts/output/nvda_snapshot_pr18560-37617,aea7db67.exe
• CI timing (mins):
  INIT 0.0,
  INSTALL_START 1.5,
  INSTALL_END 0.9,
  BUILD_START 0.0,
  BUILD_END 18.8,
  TESTSETUP_START 0.0,
  TESTSETUP_END 0.4,
  TEST_START 0.0,
  TEST_END 20.4,
  FINISH_END 0.1

See test results for failed build of commit aea7db67f6

@CyrilleB79

Any idea why the install date is not available in this tab?

I think this is done by design. In the details panel of this tab, we can see the installed version of add-ons, but other info is related to the add-on available to replace the old installed add-on, for example, the publication date. For me this is fine, in a similar way to the available add-ons tab, where we can also find some add-ons installed.
If you don't agree, perhaps you would like to create an issue, though I think that in this way it's less confusing, since info about the installed add-on is less relevant that info about the add-on to replace it.