[iOS] when App is not currently connected, can a previously connected Bluetooth device actively send a broadcast reminder that App is directly connected to Bluetooth?

I want to send a broadcast notification to the previously bound mobile phone directly when the Bluetooth device is powered on, reminding App to connect directly to the Bluetooth device instead of App to search. I don"t know how to achieve this. I don"t know how to do this. I hope you can tell me how to achieve this.

Bluetooth ios
Apr.07,2021

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b33fe7-40466.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b33fe7-40466.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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