Haven't tried on PC yet but first issue for me was that the PS5 controller mic is set to always on by default, so I was immediately just broadcasting the game sounds to my team, constantly. Had to turn that mic off.
Presumably we're all gonna hear a lot of PS5 players just random background noise until they work out to turn their mics off.
Plugged in my headset (which works fine on Battlefield 1 and on PC) and voice chat wasn't working at all in game. Partied up with someone after the game and straight away I could hear him fine, but he couldn't hear me. Or he was ignoring me. Just lots of him talking in the background.
I turned 'preferred channel' in settings to 'team' instead of 'party' and it started working in-game. But nobody spoke or responded to me. Presumably console players without mics... Or they've already turned it off.
Honestly I prefer playing RL without a headset on and with sounds from TV. So it seems I'm probably gonna have to live...