I'm trying to install graphene on my pixel 4a. I've followed all the steps, but once I restart into the bootloader interface, my phone will not connect with any device. I tried using my laptop which runs linux. I tried using a windows PC. I even tried using another android phone. It will connect to other devices when it's in it's normal mode, but once I go to the bootloader, no such luck. If anyone has any ideas, please let me know, cause I'm about ready to give up.