You could access via web browser and try this uBlock Origin list [1], props to this commenter [2] who helpfully posted it a while ago. Or if you must use a native app, on Android use a patched version of YT that supresses shorts from the view (to be honest the user agency it still allows, is for me worth enough to prefer Android over its competition)

[1]: https://github.com/Harren06/ublock-yt-shorts

[2]: https://news.ycombinator.com/item?id=43848253