Looks like she’s taken a standard piece of ply and placed a laminating pouch over the top then pressed it then added the image and pressed that.
then trimmed the excess pouch away but what’s holding the pouch to the wood and can you sublimate to a laminating pouch?
https://mega.nz/file/fs0g0CxY#bSD0U9...XqB-zLcHQnIXRE