Unable to finish battery repair with Repair Assistant

I have managed to replace the battery in my iPhone 13 mini successfully. The phone seems to work fine but the "Finish repair & restart" item is not showing up in the Settings app. It showed at first but when I tried using it it failed (something about failing to contact the server). I retried a couple more times, but the item just disappeared (nor is it available in Settings > General > About > Parts & Service History, it shows that my battery is an "unknown part"). I tried restarting, making sure my phone is connected to WiFi, disabling PiHole, nothing helped.

I hear the repair assistant is still new and very flaky, but I was wondering if I can still finish the repair. Also, is there a point in contacting Apple support about this?