Add extra row to new Toolbar in Windows 10 Taskbar

Greetings:

For one, I cannot express ow happy I am with the return of the Godly Windows Taskbar.
Even if it is not as powerful as in W10, the return of this uber tool is just... everything.
I STILL fail to get why, at a point, MS lost it's mind by losing this Windows Godlike tool: The Windows Task Bar.
Thank God, MS, you found your intellect again...
Please don't EVER do that again? :)

Now, I have made a few new Toolbars in WTB, and one sadly is running out of space.
When I try to make that particular Toolbar double row, things go haywire.
Other bars are suddenly placed differently,vanish, they do the weirdest of things, but just not what I want to become: that specific Toolbar to double space by creating a second row.
Sure, I could make a NEW Toolbar and call it "Toolkit 2", but that is not quite what I am looking for.

Anyone that can help an old man out with this minor, yet frustrating issue?:
I'd be quite grateful, if you could and would...

Thank you.

Marvelous, but this I all know.
I have a 5 row WTB, with 5 new Toollbars.
Just, one of these Toolbars is running filled up, and needs a doubling.
I made an extra 6'th row available, but that does not solve the Toolbar's doubling issue for me :)
This 6th row stays empty.

Thank you for replying.