Before Season 16, Fogged -one of the more known Tryndamere players- had made a matchup sheet. After 2026, he made it so you have to subscribe to his Twitch channel to see the updated version of Season 16, and going foreward. You can visit the website here.

He also said that there were older versions of the Season 15 matchup sheet, so that's the next thing I'm looking to find regarding Tryndamere and/or Fogged.