Google today announced a series of policy updates for apps distributed through the Play Store. The most impactful sees Google limit most developers from seeing which Android apps are installed on your device. From a report:
As part of its ongoing work to restrict the use of high risk/sensitive permissions, Google is limiting what apps can use the QUERY_ALL_PACKAGES permission that “gives visibility into the inventory of installed apps on a given device.” This applies to apps that target API 30+ on devices running Android 11 and newer. Enforcement was originally meant to occur earlier, but delayed in light of COVID-19.