G73 stuck in boot loop, not unlocked

My son has a Motorola Moto G73 5G (XT2237-2), always used it normally without trying to root it. So the bootloader has not been unlocked. It is stuck in a boot loop. I can boot into fastboot mode (by pressing power and volume down) and then into recovery, but I am not allowed to change anything. While the phone was still working properly we should of course have enabled Developer Options, Allow USB Debugging and Allow OEM Unlocking, but it is too late for those. Is there another way to get to the data before doing a reset? - If side-loading the firmware in recovery mode is possible, I guess that would wipe the data, but mounting in recovery mode (to save any content) does not seem to work. - I tried accessing the phone with fastboot and adb (from the linux prompt) and the phone recorded receiving the commands fastboot oem unlock and fastboot flashing unlock, but then that was not allowed because we had not allowed unlocking from the Developer Options menu.