New feature being tested by Instagram shares users' Location History with Facebook
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Back in 2012, Facebook acquired Instagram for $1 billion. At the time, Instagram had just released its Android app, and Instagram was known for its photo filters. Now, Instagram is one of the most visited apps thanks to the stories feature and its new focus on long-form video streaming. And while Facebook continues to suffer from privacy issues, security breaches and Russian meddling in U.S. elections, Instagram's reputation has not been marred by Facebook's ownership of it.
It appears that the features being tested are set to be "on" by default. If Facebook decides to add the new Location History setting to Instagram, users should be able to opt-out of the Location History sharing. Right now though, we have no idea whether this will be added to Instagram. If it is, we wouldn't expect Facebook to announce the addition with a trumpet fanfare.

Instagram tests a feature that shares users' Location History with Facebook
Things that are NOT allowed: