SEO isn’t something google invented, it was just a result of their actions.

Somehow they might got a special version of the app. Really really unlikely though, it’s probably just A/B testing or false logs.

It doesn’t require you to use Facebook though. They might use FB analytics or tracking, but probably dont, or only for very few users.

Exodus Privacy detects trackers in apps, here is their report for Ally: https://reports.exodus-privacy.eu.org/en/reports/com.ally.MobileBanking/latest/

Many other apps contain way more and worse trackers, just some Amazon and Google Firebase is on the light side.

According to Exodus Privacy (they analize mobile apps for trackers), Ally only contains Amazon and Google trackers (Google Firebase Analytics is used by almost all apps): https://reports.exodus-privacy.eu.org/en/reports/com.ally.MobileBanking/latest/

Others also say their Ally app doesn’t connect to Facebook. Maybe you have a Unicorn or a modified app (rather unlikely though)?