Does anyone know a product or a DIY solution to attach your DJI OM 4 to your backpack strap?

Hello there Stabilo. Thank you for reaching out and for these information you have shared with us. Since this is a 3rd party accessory for your DJI OM 4. I hope that you will get the best recommendation from our fellow DJI co pilots on what accessory they are using and where they have  purchased the said accessory. Thank you.