Welcome to the community!
That said, if that screen came up by accident, have you tried the Volume down button to cancel procedure and restart the phone? What phone do you have? At least for Samsung devices, there does appear to be a combination of button presses which will arrive at a custom OS screen like the one you've shown (see here). They also note that there are a different combination of button presses for other functions such as factory reset. You should note that the specific combination of button presses might differ for the different device models (as well as from different manufacturers). You might consider searching for a sequence which is specific to your device model.
Hope this helps 😀