Hi KI0ibi, your project it's really good but I have some ideas for it, you could add a battery to it and make it detect and display in percentages how much current does the battery have left.

Also I have another idea, I tried the fake Bluetooth advertiser especially on an iPhone, and saw that sometimes it detects it as another iPhone trying to connect and in the target phone, prompts the user to click to send their phone number, I think you could make another option for iPhones that does that and captures the phone number and displays it on the screen.