For the record - 570.86 is now packaged for Tumbleweed.

SInce you said ‘since the Plasma 6 update’ I assume you are using Tumbleweed.

Some ideas:

• can you rollback to a previous snapshot and see which one behaves best?
• if not, can you identify which snapshot made things work based on https://lists.opensuse.org/archives/list/factory@lists.opensuse.org/ and look at the list of changes? That can narrow down the problematic package
• look into the Pipewire issue tracker. I found https://gitlab.freedesktop.org/pipewire/pipewire/-/issues/4319 which is about a similar headset (WH-1000XM5 )