Andromeda Oxygen Arc - anyone else ever found it?

I am currently on a long project with Andromeda to try and find the Oxygen arc Bray Falls and Marcel Drechsler discovered.

https://www.youtube.com/watch?v=H9sqPHiCypE

https://iopscience.iop.org/article/10.3847/2515-5172/acaf7e?fbclid=IwAR12grzwnrY-GHKDBsR9sp9s3sMGPR-hQb2-TBZbi3cNsNfbCJW-98wkG6M

I am about 7 hours in on Oxygen and I see nothing, nada -not a trace. While I'm not expecting miracles here, I would expect some signal, even a tiny tiny bit).

The scope I'm usin is the same as Bray's - the FSQ-106EDX4 F/3 (Tak reducer)

I know 7 hours is a far cry from 100+ hours, but where's the arc?

I am not doubting the find or the data, but I'm curious if anyone else has ever photographed it and at what aqusition level you started to detect the arc?