I transferred data on 2 new iPhone 12 minis

One transfer only had a small glitch on the 2 minutes left. The second has been stuck for 48 hrs. I read comments it can take a long time. Come On! I would like to use my phone. New phone appears to work fine but I can’t close down the old one or it asks if I want to cancel the transfer. I did not see an answer to my issue as mine has not resolved by itself.