You could but steganography is not encryption so it is not recommended to use to secure your seed words.

Steganography faces some challenges regarding privacy and security:

Steganography attempts to hide the very existence of secret data, but it does not necessarily ensure the confidentiality of the data once it is discovered. Once detected, an adversary could extract and read the hidden information.

Steganography is not an encryption method and does not provide the same level of security as encryption. The hidden data is concealed by modifying non-secret carrier files like images or audio, but it is not scrambled like encrypted data. An adversary with the right tools may be able to detect and extract hidden data.

Most steganography techniques operate at the bit-level and modify bits in carrier files to embed secret bits. This makes the carrier file susceptible to errors or modifications that could corrupt or destroy the hidden data. Encryption provides error detection and correction capabilities to address this.

Public key steganography techniques providing properties like non-repudiation are still an active area of research with no widely adopted solutions yet. Most existing steganography relies on private key techniques with weaker security compared to public key cryptography.

Clients should include the seed phrase for nsec as well

Thumbs up for Ava's answer - steganograpy alone can be detected and if using plain text easily deciphered.

So make sure you first encrypt your secret/seed/nsec, then use steganography to hide encrypted text into the file/photo/document.

My advice would be to start small (don't play with your btc seed just yet). Instead you could try hiding a "secret message" within your art and give instructions to decipher it to whoever buys the piece.