I don’t do voice chats on Deck. But when I only have a short time to play, I just use standard Apple earbuds that I’ve had for years.
When I get to game for more than an hour and feel like gaming on the couch, then I use my JBL Quantum TWS earbuds with the USB C adapter. These are primo ear buds, incredibly low latency, sound excellent, and are immersive with the noise canceling and noise isolating. Built in microphone, but I don’t use it for that purpose. I’d imagine for the price point the mic quality should be somewhere between good and great, depending on preference.
Edit: I chose the JBLs primarily because of the low latency. I can’t do Bluetooth because the input lag is so noticeable. Some Bluetooth headphones are great at reducing it, but nothing beats a USB receiver if you’re looking for low latency wireless. A note of caution that you’ll use up your USB C port so you can’t sit and charge your Deck. This setup works great for me though when I feel like having a semi long gaming session, but if I’m gonna game longer or play a more demanding game I head to my gaming PC instead.