Go into the settings.json file
Change ->
"terminal.integrated.fontFamily":"monospace",
to ->
"terminal.integrated.fontFamily":"MesloLGS NF",
save the file and your integrated vscode terminal should look correct
/* Download a powerline font like Cascadia Code PL and then add it to your
VsCode settings.json using */
{
"terminal.integrated.fontFamily": "Cascadia Code PL",
}