Laptop Chat via Bluetooth?

Is it possible to set up a network with two laptops via Bluetooth, so that you can chat at a short distance, for example, but also exchange data in general?

Yes, with the data exchange is definitely
From the network via Bluetooth I would not know anything.
but I would watch out for this issue as Bluetooth is already unsure what to do with such things as data exchange in particular

In the Microsoft Store there's the app "Bluetooth File Transfer". With this you can copy files back and forth with all bluetooth-enabled devices.

To chat, there's the app "Messenger (Bluetooth)" in the Microsoft Store.

Both apps are free.