Try holding power and volume down. It should reboot. Just don't select the reset option or you're screwed. You could be screwed anyway, but that's worth a try.
nostr:nprofile1qyt8wumn8ghj7ct5d3shxtnwdaehgu3wd3skueqpz4mhxue69uhk2er9dchxummnw3ezumrpdejqqgxptfdxtxrw026pxn0w82u9y4x6t3w5kp883d83djpgxuvj6d23s5a989q3 needing urgent support. My battery died and phone is stuck on Graphene OS screen for quite a while now. Force restart is not working. Need help troubleshooting urgently.