Advert for the modern version says 20-25 miles on a
48V 10ah battery; in theory you should get three times that; 60-75 miles. In practice I think that is very unlikely despite the big battery; you might get it if you pump up the tyres as far as they can go, and go very sedately with some pedalling on an excellent flat tarmac road on a windless day. I'd second Nealh's suggestion of 30-35 miles for realistic on road riding in not too hilly terrain.
I think you'll enjoy the moped when you finally get everything working, good luck.
To get an idea of how things vary depending on conditions and riding style look at
https://www.bosch-ebike.com/en/service/range-assistant/. That will give more of an idea of variability under different conditions rather than actual range of your very different moped. You'll get an idea of range if you choose the 500w battery and multiply by the result 3; BUT set everything to the most pessimistic choice (low cadence, heavy weight, cargo bike with poor tyres, etc)