Exactly what I said. Windows install will remove an existing efi partition and create its own new efi partition, which will then necessitate an excrutiating recovery process to recover the existing linux installs.
After the fact – after you have an installed and functioning linux system then you decide “after the fact” to install windows. You are installing windows after you have already installed linux and recovery will be painful.
The normal and painless way is to install windows first then install linux to dual boot second or third or later. Linux does not destroy a windows install, but windows will most often destroy booting for a pre-existing linux install.
I have assisted a couple times in recovery with a windows install done after the linux install and it is not easy, though it is possible.
This thread is one where recovery was necessary after a windows (re)install and did succeed.