You can try using the shaders and fix in this thread: (Case 1227083) Tree Nature/Soft Occlusion shader in URP
https://forum.unity.com/attachments/treecreator-zip.683934/
- Shaders go in asset folder
- Other file goes in the CGIncludes folder in the editor (remember to paste it in there every time you install a new editor)
NOTE: the editor folder is not in the game project, you need to find the editor in explorer and paste it in that way