Operating system: Windows-10-10.0.17134 64 Bits
Graphics card: GeForce GTX 1060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 419.17
Broken: version: 2.80 (sub 72), branch: master (modified), commit date: 2019-05-24 18:21, hash: rB203f9a49e29c
It has been this way for a while I believe.
Short description of error
Default Sculpting workspace has the "Tool Settings" bar shown, but if you create a new Sculpting workspace from the small /+\ tab, the new workspace (Sculpting.001) does not have the bar shown by default.
Exact steps for others to reproduce the error
New document, switch to Sculpting or Texture Paint workspaces, not visible Tool Settings bar. Click the rightmost tab icon /+\ and create a new workspace of the same type, switch to the new .001 tab and see that the bar is not shown there.