Perfect, I ran the tool using a windows recovery partition that was still active. It dumped the BIOS perfectly and after decoding it to hex and using some Regex magic (searching for !{S.y.s.t.e.m.S.u.p.e.r.v.i.s.o.r.P.w ) I was able to retrieve the password which was stored in plaintext (Nice one Xiaomi)
Thanks @SMDFlea for all the help, much appreciated
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