I have been able to use flash firmware and install Xubuntu 24.04 on the Acer Chromebook CB315-3H-C0VT and it was working since I believe July 18, 2024.
After turning it off when moving somewhere else on July 28, 2024, I can no longer turn on the chromebook without plugging it into a USB-C charger that came with the chromebook, and after it booted, regardless if i can do so with or without the charger, I cannot see the battery life remaining on the Chromebook even when the chromebook is unplugged and using the battery, as the battery indicator is just a question mark.
At first, i thought it was the operating system, and decided to run xubuntu on a live usb, and even then, the battery indicator is just a question mark and I am not sure if there is an issue on the firmware, software, or if it is the battery itself.