Outage question 5g @Home

I have a S23Ultra and I also have Verizon 5g @Home service. My phone was affected by the outage yesterday. When I got home from work, my phone was still part of the outage, but my 5g router wasn't. I received all my notifications via Wi-Fi as soon as I walked in the door. I know the router has a sim/phone number. Why wasn't it affected?