Unlike LibreOffice Calc, Microsoft Office Excel gives you the ability to apply patterns and gradients in the "Format Cells" dialogue box right before the "Cell Protection" page
Steps to Reproduce:
Right click on any document cell and select "Format Cells"
The second last tab "Background" only allows for the customization of cell colors
The second last tab "Background" would have customization options for patterns and gradients on Excel
User Profile Reset: No
Build ID: 1:6.4.6-0ubuntu0.20.04.1
CPU threads: 4; OS: Linux 5.4; UI render: default; VCL: gtk3;
Locale: en-US (en_US.UTF-8); UI-Language: en-US
While bug 49177 only mentions gradient, I'm still marking this as a DUPLICATE. You can add the request for patterns as cell background there.
*** This bug has been marked as a duplicate of bug 49177 ***
(In reply to Ming Hua from comment #1)
> You can add the request for patterns as cell background there.
Alas, no need. I see now the request for patterns is tracked separately as bug 31205.