MangaTime allows you to import your manga list directly from MyAnimeList just by entering your username.
Before doing that, make sure your manga list is set to public so MangaTime can access it.
Follow these simple steps:
Open MyAnimeList and tap the menu icon.
Tap on your username to open your profile.
Open the Settings page.
Tap the Lists tab.
Make sure Manga List Privacy is set to Public.
Go back to MangaTime
Open the Profile tab using the bottom navigation bar
Open up the settings by tapping on the gear icon in the top right corner
Press on Import from MyAnimeList
Enter your MyAnimeList username, and that’s it, your list will be imported automatically!