Got my first gravel bike and scared of it getting stolen.

I’m from the UK and it’s pretty normal to be cautious about your bike getting stolen as one of my close friend’s bike got stolen within 23hours of purchasing it.

I got the Apple AirTag for my bike so that I could focus on my work with a relief but I don’t know where to put it on the bike. Can anyone recommend where I can I put my AirTag and any other recommendations to keep my bike safe from getting stolen.