you need HJSplit then boot into windows PE then create the main partitions split 100 gb from your main to install windows then delete the partition than excute a bat to merge the files and to export the wim then you do DISM /apply-image /imagefile:install.wim /index:1 /applydir:C:\ then bcdboot C:\Windows /s W:\
how did you do it?
you need HJSplit then boot into windows PE then create the main partitions split 100 gb from your main to install windows then delete the partition than excute a bat to merge the files and to export the wim then you do DISM /apply-image /imagefile:install.wim /index:1 /applydir:C:\ then bcdboot C:\Windows /s W:\