This shows your PowerShell profile location:
$Profile
It's usually somewhere like this: C:\Users\My Username\Documents\WindowsPowerShell
.
Oh-My-Posh Docs: https://ohmyposh.dev/docs/pwsh
You probably have to use Nerd fonts in order for symbols to render properly.
Nerd fonts: https://www.nerdfonts.com/font-downloads
By default, Ctrl+Backspace in integrated terminal of VSCode to delete last typed word does not work for Powershell. This is probably a bug. Currently, a fix is to add the following code to your PowerShell profile:
if ($env:TERM_PROGRAM -eq "vscode") {
Set-PSReadLineKeyHandler -Chord 'Ctrl+w' -Function BackwardKillWord
}