I’ve been able to get new IPs by simply power cycling my IP - though my IP also used to change randomly on its own also (I always presumed there was some network outage in the night when this happened though), I’ve also had quite a few different ISPs and they all worked like this, maybe it’s more common in the UK.
I only know this is the norm because I host a website and media server from my home and had to update my DNS records everytime my IP changed, so I started to request static IPs