Extend your C drive in Windows 11..

 Extend your C: drive by following  these simple steps.
                                                ->  Open Command Prompt as Administrator.

                                                -> Copy Id and Attributes 

Type: 

 reagentc /disable

diskpart

list disk

select disk 0

list partition

select partition 4

detail partition

delete partition override 

Extend the C: drive using Disk Management. 

Create a new Recovery Partition from the unallocated space

diskpart

list partition

select partition 4

set id=   paste here

gpt attributes= paste here

 To Hide: 

list volume

select volume D

remove letter=D

reagentc /enable

--Done--