I didn't create any new SHR volumes, however the drives were initialised in DMS after the re-install.
I did take the drives out and put them into another machine with Ubuntu installed on a separate drive. Being a complete noob with linux in general, I followed whatever guides I could find in attempt to restore the volumes. So I do expect I installed lvm2 on the ubuntu machine while the synology drives were connected.
Most of the data was non-critical but there is some stuff I would like to recover if at all possible. At this point I just need to figure out whether it's worth any more of my time trying to recover the stuff or if I should cut my losses and start fresh and learn my lesson