Just say uk as that’s where you’d have got ur passport from and tbh if for some reason you got it abroad, still put uk as I saw someone got rejected for having a random country as their place of issue
You 100% have to be outside the country, you’ll need to provide proof of this such as exit stamp from your passport or your hotel booking. You have to be in the city of the embassy you’re applying through
Was this a request for additional info? If not, I applied from uk with just a photo of my driver license which had my uk address, and was approved with that