Where did sif go!?
As she didn’t appeared in Thor: Ragnarok.

No idea where did she go after Thor Dark world, I think she disappeared from MCU as she took the lead role in a TV show: Blindspot. We know for the fact that Lady Sif was Decimated by the snap (as we saw her name in Russo Brothers List).

But before the snap means in Ragnarok she was still missing. So where did she go between TDW to Ragnarok!

Wait a sec who is Sif!!!!!!!!!!!!!!

She was messing from dark world . After that don’t know where she has gone .

Sif might have been killed by the frost giant