https://disk.yandex.ru/d/_LWZvwTJG0x7vw
Copy darklazqt5/lazarus to your lazarus directory (this contains 64bit qt dll and udarkstyle.pas)
Apply darklazqt5/lazarus.pp.patch
Build Lazarus with qt5 widget type
contains only 64bit dll
Perfect! Thank you so much for the help!
Got it working, looks great.
More info that might help others, I also used "Delphi IDE Theme Editor" tool and using "yggdrasil" theme.
What it means to "Apply lazarus.pp.patch" is that you need Git, copy the patch file to the lazarus installation folder and use CMD to get to the same folder and use "git apply lazarus.pp.patch" and that's it. Now launch lazarus normally. To get docked style IDE, I used these packages packages (from menu Packages Install/Uninstall packages): "AnchorDocking 1.0," "AnchorDockingDsgn 1.0" and "DockedFormEditor 0.0".
If you try to compile a project you may get an error if you don't have qt5 installed, you can use LCL by going to Project options > Config and targets > I chose win32 wigetset because I'm on Windows. --- Waiting for M$ implements an actual win32 GLOBAL dark theme

Hope this helps.