Installing Windows 11 or 12, limiting used space for the OS

Hello all,

I'm preparing a new build which will run Windows 11 or possibly Windows 12 if I don't get around to it sooner.

Installing on a SSD (e.g. 1TB, all of it unpartitoned space), will the installer let me define which space to allow for the installation (e.g. 100 GB) and let the rest (e.g. 900 GB) remain as free space for a data partition?

I seem to remember reading a recommendation to prepartition the SSD as I would prefer it (e.g. 100 GB / 900 GB) and then remove the first partition. That would only leave 100 GB of free space for the installer. Would this be a necessary step?

Thanks in advance for any input!