Features like this exist for putting the phone back at rest when there hasn’t been a successful unlocking for X hours – GrapheneOS, an Android OS, has a similar feature. The objective is to limit the window of time an attacker has to try to exploit anything the phone may have in operation during a not-at-rest state (when the user is still ‘logged in’ to the phone, certain background services / features may be available to exploit).
Rebooting automatically, especially if the phone not has not been successfully unlocked recently, may place the phone in a less exploitable state, as those services / features might not be available without logging in first.
Currently, I prefer the Kagi model as my daily driver – pay a small fee each month and not worry about having your search data, in all its forms, sold instead. They have some neat features, as well, like AI summaries.
There is also SearXNG, which is an open source, privacy-respecting, hackable metasearch engine. It can be self-hosted and also have a number of instances you can access.