Hi, let's say we have one RPA unattended license and one bot that takes just 1 hour to be executed. The remanent 23 hours the same license can execute other bots? or we need to buy new licenses?

Hi, let's say we have one RPA unattended license and one bot that takes just 1 hour to be executed. The remanent 23 hours the same license can execute other bots? or we need to buy new licenses?
With one unattended license you can execute as many flows as you like in _sequential_ order, not in parallel.
So regarding your example, yes, you can and should use the remaining 23 hours to run other flows.