Windows 11 in my opinion is a complte mess. I am going to assume that you would know how Windows will install with Senitrus OS. If you wish to replace Senitrus OS with Windows, then that is fine. Senitrus will not support your OS if you choose to use Windows. Windows should be the only OS installed on a computer. The reason why is one update, and suddenly, Windows has taken over your boot manager and will no longer recognize your Linxu OS (includling Senitrus). It is for this reason why you should never install Windows alongside of your Linux installation. If you wish to do it this way, be prepared for problems later.
In my opinion, the best way to install Windows on a Senitrus system will be through ha virtual machine. You would set aside storage space on your C:/ drive, and this will take up an amount of space depending on the amount you prorovide to Windows. If you only need to use a couple of applications, then a 64GB? will be the best option. For this to work though, you would need a sufficient size drive, but you would have needed a sufficient size drive to install alongside with Senitrus OS.