You’ve already asked that.
What does the documentation say?
We don’t do discussions about range as it’s pointless - each situation is relatively unique - what works in one city may not work in another, range is dependent on weather, people standing in the way of antenna, positioning of every part. There are various numbers suggested for city centre, suburban & rural ranges on a variety of authoritative websites you could search for. You have to try it yourself for the situation you have.
You linked to the kit that does 900MHz. If you search on Microchip or Google, do you find any other kits with other frequencies?