Switching between Chrome browser windows
The shortcut Command + ` (the key just above the tab key on your keyboard) is the standard Mac OS shortcut for switching between the windows in the currently selected application, and works in Chrome.
If Chrome is on the first place (leftmost) on your taskbar, press "Win + 1" TWICE to switch to the second window, working exactly like "Cmd + tilde" on Mac; press them ONCE to switch back.
If your Chrome is on the second place, press "Win + 2" TWICE to switch;
and so on.
Looks like the old COMMAND + ` combo no longer works.
Try control + left/right arrow instead.
Worked on my m1 Macbook pro running macOS Big Sur.