Currently these options in Windows 10 settings are not synced:
1) Mouse cursor custom color
2) Keyboard Cursor
3) Windows update Advanced option settings
4) Safe search settings in Windows settings => Search
5) Indexing option in Windows settings => Search => Searching Windows
6) Storage Sense toggle in Windows settings => System => Storage
7) Color options in Windows settings => Personalization => Color
Windows 10 insider Dev channel
Link to feedback hub feedback to upvote or add additional details: https://aka.ms/AAbdhf