indent and unindent in vscode and its descendant when tab/shift-tab not work

Option 1: Use Vim's Native Indentation Commands
In Vim mode, the standard way to indent is:

Visual mode: Select lines with V, then use > to indent or < to unindent
Normal mode: >> to indent current line, << to unindent
Multiple lines: 3>> indents 3 lines, 5<< unindents 5 lines