How to restore windows boot after linux installation?

Question

linux

I know that there are many similar problems, but I don’t know if they suit me or not. Bottom line:
I put kubuntu next to win10, I thought, as usual, there would be a choice of OS to boot (100 already did not work under Lin), but in the end I only have Kubuntu and that's it. No boot menu and I do not understand how to return. There is no normal Grub boot menu.
As I understand it, this is somehow connected with the fact that UEFI is on the computer, but I have not encountered it.
efibootmgr gives

BootCurrent: 0000
Timeout: 1 seconds
BootOrder: 0000,0002,0001
Boot0000* ubuntu
Boot0001* Hard Drive
Boot0002* CD/DVD Drive

those. it seems like it doesn’t see Win at all.
The disk looks like this:

In the BIOS (probably UEFI is more correct?)

How to make a boot selection menu?

Answer 1

Run in console:
sudo update-grub
Grub should detect Windows. If for some reason this did not happen, then follow the instructions: Grub error does not see Windows 10

Answer 2

Check the contents of /boot/efi , there should be a folder from Microsoft. If not, you need to copy it from somewhere.