I tried to get the aosp notificationbar and I am succesfull in it but there is an problem of some black used space look at the screenshots below
So here is the method
① Install xposed framework and enable it
② Download ReGXM module and Wanam Xposed
③ Enable ReGXM and hed towards Systemui settings and tools settings and enable all the options in it
④ Now enable wanam open it and go to theme and ✔ " Hide no notifications title bar "
⑤ now done do a soft reboot