Minecraft - ps4 and pc gamers - chatting together?

I recently started playing Minecraft on the PC, together with my boyfriend and a friend who both play on the ps4. Now I can't really talk to either of them.

The following: My friend and I sit in the same room, he on the ps4 and I on the PC. He talks to girlfriend about the ps4 with a headset, so he hardly hears when I say something and I don't hear our girlfriend. If he would play the sound on the TV so that we could all talk to each other and hear each other, then our friend would hear twice, which would also be annoying for her over time.

Is it somehow possible to connect two headsets to a ps4 so that I can just talk to them about their game or ps4? Then I hear his game sounds but I think I could live with it.

Or do you have any other and much better idea?

Thank you in advance

For people who are familiar with Minecraft, I would have one more question: My friend created the world in which we gamble for the third time. However, girlfriend and I can only gamble when my boyfriend gambles in our world. Can you somehow convert that to a server so that we can gamble independently in our world?

So to your 1st question:
you could simply use an app or something on your smartphone and then make a group call
you can of course also simply connect 2 headsets. For example, there are those that can be connected to the ps4 via usb, so you can then simply buy a usb distributor and 1 headsets and your friend will listen via controller or you can simply use a doubler that you can connect directly to the headset interface at the bottom of controller connects, however, the volume is quieter.

now to your 2nd question
I don't know about compatibility between ps4 and pc
you can give it a try and open a server but they cost something
but you can also look at https://server.pro/ there they are free