Comment 5 for bug 1844809

If it is related to that - you should do
gsettings set org.gnome.desktop.wm.preferences focus-new-windows 'strict'

(see
https://major.io/2015/07/06/allow-new-windows-to-steal-focus-in-gnome-3/
)

I'm here because I type in notification bubbles themselves, and since gnome 3.34 these notifications do not have focus when I bring them up, I have to explicitly click inside them (which doesn't always work).