BD-3677: Add troubleshooting for few or no direct opens for iOS push

[bre-fitzgerald]

Why are you making this change? (required)

Resolves BD-3677 as part of the initiative to source docs feedback from KB articles.

Related PRs, issues, or features (optional)

• BD-3677

Feature release date (optional)

• N/A

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[internetisaiah]

No need to use my suggestions 1 for 1, but I cleaned up the content of the KB article to be more clear.

[bre-fitzgerald]

Thanks @internetisaiah! Great edits, accepted 🫡

[internetisaiah]

LGTM!