Because trimming videos on iOS is awesome and on Graphene it sucks, I created this:

Video Razor – A minimal Android video trimmer with nondestructive editing, precision zoom for frame-accurate trimming, and instant sharing

https://zapstore.dev/apps/naddr1qvzqqqr7pvpzqun2rcnpe3j8ge6ws2z789gm8wcnn056wu734n6fmjrgmwrp58q3qqtxxmmd9en8yctw0fshqtnkd9jx2mmjv9ax7us70mw4w