Based on posts above, I tried this combo, and it works for an ok total price. $17.98 plus $6.99 when I ordered them, and this is in the US. $24.97 total. Though the adapters are now showing $7.99.
Joncy Usb 3.1 Type-C To Hdtv Hdmi Adapter
https://www.amazon.com/gp/product/B075GX8V3B/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
Electop USB 3.0 Male to Type C Female Adapter (2 Pack)
https://www.amazon.com/gp/product/B07B47V967/ref=oh_aui_detailpage_o00_s01?ie=UTF8&psc=1
One thing to note is at first it was showing charging but didn't charge and the headset did not work. So I then tried to connect a USB thumb drive into the USB connector on the box and it didn't work. I also tied connecting to my computer into the USB connector through the adapter and it didn't work.
I then tried re-connecting the box to the phone for the 3rd or 4th time, and all was good. Sound works. Mic works. And it charges. Now it works every time I connect. So either I'm more consciously pushing the connector on, or there was maybe something that was keeping it from seating all the way originally.
Also, I lost the original Google adapter, so I have these as well. Two for $19.90, which is pretty comparable to Google with their shipping charge on small orders. They work, though I think the audio is not as good as with the OEM when using OEM earbuds that have come with prior phones.
https://www.amazon.com/gp/product/B07DY8B9GR/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1
Joncy Usb 3.1 Type-C To Hdtv Hdmi Adapter
https://www.amazon.com/gp/product/B075GX8V3B/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
Electop USB 3.0 Male to Type C Female Adapter (2 Pack)
https://www.amazon.com/gp/product/B07B47V967/ref=oh_aui_detailpage_o00_s01?ie=UTF8&psc=1
One thing to note is at first it was showing charging but didn't charge and the headset did not work. So I then tried to connect a USB thumb drive into the USB connector on the box and it didn't work. I also tied connecting to my computer into the USB connector through the adapter and it didn't work.
I then tried re-connecting the box to the phone for the 3rd or 4th time, and all was good. Sound works. Mic works. And it charges. Now it works every time I connect. So either I'm more consciously pushing the connector on, or there was maybe something that was keeping it from seating all the way originally.
Also, I lost the original Google adapter, so I have these as well. Two for $19.90, which is pretty comparable to Google with their shipping charge on small orders. They work, though I think the audio is not as good as with the OEM when using OEM earbuds that have come with prior phones.
https://www.amazon.com/gp/product/B07DY8B9GR/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1