>>23381827https://x.com/chocolateshop_i/status/1929942982075294046
Yes, it's not officially part of Secret Rendezvous, it's a commissioned magazine illustration that was drawn using Secret Rendezvous as a reference, nothing more. Just like all those anime magazine illustrations by a wide range of people depicting things or events from Zeta, Wing, etc but are not actually screenshots or official art from the animation. Due to artist's license, they may have their own style or deviate somewhat from reference material, like this magazine art that gives the Hyaku Shiki a custom shield.