To developed an Apps for IOS and Android for our electronics products with AR interactive functions.
Similar to Apple showing it's Ipad Pro via AR.
to include geo location function to search for special
attached for reference.
AR showroom is possible and relatively easy to do: it can be made both with Unity AR Foundation and WebAR (in case you want to integrate it in the website).
Location-based AR is also possible but depending on the GPS coverage of the area precision might not be optimal.
It's probably not possible to expose a virtual Bluetooth speaker considering how Android is built, let alone iOS.
Let me know more details in chat if you are interested.