You can see the boot partition on Windows. In fact /boot is the only partition you can see on Windows.
Go to Step (5) of OPTION-1 or OPTION-2, of this thread:
In very unlikely case that using the above method you are still unable to see boot partition, go to windows search, type cmd.exe, and press Enter button. This will open windows command prompt console. In this console type following, and it will create a file ssh in /boot partition of microSD card:
C:\Windows\System32> echo > E:\ssh
Hit ENTER key
(Replace letter E by drive letter of your microSD card)
This will create a file named ssh in microSD card’s /boot partition.