There are mutiple ways to do this. Usually, pressing the Share log file button is enough.
/storage/emulated/0/Android/data/net.kdt.pojavlaunch/files/latestlog.txt
- Install Files by Marc apps & software from Play Store.
- Press the 3 lines in the top left corner → PojavLauncher → latestlog.txt
If PojavLauncher does not appear in the 3 lines menu, try closing (or opening) Pojav. If that doesn't work, try restarting your phone. You can also use ZArchiver (or MiXplorer) with Shizuku to access it.
/storage/emulated/0/games/PojavLauncher/latestlog.txt
All file managers can access this directory. ZArchiver and MiXplorer are recommended.