https://github.com/microsoft/vscode/issues/113175 Workaround

vscode-right-click-hotfix.desktop

[Desktop Entry]
Name=vscode-right-click-hotfix
Type=Application
Exec=/usr/bin/env vscode-right-click-hotfix

vscode-right-click-hotfix.py

#! /usr/bin/env python3

from Xlib.display import Display
from Xlib import Xatom, X
from Xlib.ext.xtest import fake_input


def grab_button_3(window):
    window.grab_button(
        X.Button3, X.AnyModifier, False,
        X.ButtonReleaseMask,
        X.GrabModeAsync, X.GrabModeAsync,
        X.NONE, X.NONE
    )


def ungrab_button_3(window):
    window.ungrab_button(X.Button3, X.AnyModifier)


def list_vscode_windows(display):
    root = display.screen().root
    res = root.get_full_property(
        display.get_atom('_NET_CLIENT_LIST'),
        Xatom.WINDOW
    )
    if res is None:
        raise Exception('Cannot get client list')

    vscode_windows = []
    for wid in res.value:
        w = display.create_resource_object('window', wid)
        if w.get_wm_class() != ('code', 'Code'):
            continue
        vscode_windows.append(w)
    return vscode_windows


if __name__ == '__main__':
    display = Display()
    display.screen().root.change_attributes(event_mask=X.PropertyChangeMask)

    vscode_windows = list_vscode_windows(display)
    for w in vscode_windows:
        print('grab window ' + str(w))
        grab_button_3(w)

    while 1:
        event = display.next_event()
        if event.type == X.ButtonRelease:
            print('simulate right click on ' + str(event.window))
            ungrab_button_3(event.window)
            fake_input(display, X.ButtonPress, X.Button3)
            fake_input(display, X.ButtonRelease, X.Button3)
            grab_button_3(event.window)
        elif event.type == X.PropertyNotify \
                and event.atom == display.get_atom('_NET_CLIENT_LIST'):
            new_vscode_windows = list_vscode_windows(display)
            for w in new_vscode_windows:
                if w in vscode_windows:
                    continue
                print('grab window ' + str(w))
                grab_button_3(w)
            vscode_windows = new_vscode_windows

vscode-right-click-hotfix.service

[Unit]
Description=VSCode Right Click Hotfix

[Service]
Type=simple
ExecStart=/usr/bin/python3 -u vscode-right-click-hotfix
Restart=on-failure
RestartSec=5s

[Install]
WantedBy=gnome-session.target