Blindspot season 4 on Bluray & DVD is available for pre-order on Amazon (release date: November 26, 2019 in USA).
There’s no info about the extras yet. It seems that in UK it will only be available on DVD from December 30.
Elizabeth is in the episode 4×19.
Note: we updated the shop page with the links of where to buy Liz’s projects (Bluray/DVD/Streaming).