Boiler temperature

Hey! Recently got the hive system in my home but just want to clear up;

My temperature on my boiler was low so my "actual" temperature on the hive thermostat wasnt reaching the 21oC.

Do i just keep my boiler temperature up at high so it allows the radiator to heat up at a higher temperature as it was probably too low to hit the temp i set the hive at?

Sorry if this is so straightforward, its a new home ive moved into lol!

Thanks