Serious Question- The tech that was built to be an answer to this sort of thing ,Deniable Encryption and Plausible Deniability, exists in ...it looks like, Veracrypt, and possibly the Phone variant EDS(to a smaller extent)-

But, how come there's been nothing else in the field? The only thing that appeared in the past decade to be more advanced on that front was this,

https://www.bankinfosecurity.com/rise-self-concealing-stegan...

https://i.blackhat.com/eu-18/Thu-Dec-6/eu-18-Schaub-Perfectl...

https://portswigger.net/daily-swig/russian-doll-steganograph...

and there's been nothing since... It must truly be hard to make fully deniable encryption mechanisms..unfortunately....