Is it possible to reduce internal window reflection?
There are things such as anti-reflective/anti-glare film that many storefronts, counter displays use to increase see through. It's not often used privately though.

One example is this: https://www.ssidisplays.com/anti-glare-film-window-displays/

I'd try asking somewhere they sell glass for windows-panes or whole windows.

Just remember, it's very limited how much it would work with a lighted room, at night, looking out into the dark. Try lowering the light intensity in the room a bit as well, possibly. That could be done with a bulb of lower wattage.