I have the EA game Battlefield: Vietnam, it doesn't play well with Windows 11.

since Battlefield Vietnam is such a rare played battlefield I do not have alot of knowledge of it but I'm pretty sure it could be made to work using community made fixes.

I suggest joining the last remaining battlefield Vietnam clan, named helloclan

here is discord or website they'll probably be able to help you.

https://www.helloclan.eu/resources/categories/2/

https://discord.gg/UVzSQNBPm8