guitar tuner drop d flat

in the form of flat notes (Bb Ab, etc.), what corresponds to F #?

this tab im looking at this tuning: (low to high, I think its drop B) DB # DAEB what would be "flat", similar to F # (my guitar tuner shows no B # C # F #, sharp notes at all) I put the head. then F # will be (in standard tuning) the b string.

Gb G # / A, A # / Bb B / Cb, B, C #, C # / Db, D / E #, E / Fb, F / E #, F # / Gb, G / Ab, G # / A

Tuner Series/ TU-80, TU-12, TU-12H, TU-2, TU-15

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