Davinci Resolve seems to read "Created Time" of clips from its file created time, which is usually get overwritten by some file operations such as copy. In order to preserve the correct video time of being recorded, use ExifTool to set the metadata correctly before importing a video into Davinci's media pool.
exiftool -FileCreateDate<CreateDate "path\to\videos\*.MOV"
Additionals tips:
# Check all metadata of a file
exiftool video.mp4
# Check all metadata as short form i.e. the one to specify a tag in command
exiftool -s video.mp4
# Also the FileModifyDate
exiftool -FileCreateDate<CreateDate -FileModifyDate<CreateDate "path\to\videos\*.MOV"
# Process files in subfolders recursively
exiftool -r -FileModifyDate<CreateDate "path\to\videos\" -ext MOV