Unsure if this device is supported - Acer Chromebook Plus 515 | CB515-2H

[yan]

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RW_LEGACY firmware no longer working on OMNIGUL

I recently installed the RW_LEGACY fw on my Chromebook but after an update it showed up as U-BOOT instead of edk2. I re-flashed the RW_LEGACY fw but when trying to boot from it beeps and says something went wrong. Using an older version of the stock firmware only then does it work. Does edk2 need to be updated to work as a payload with the new firmware?