Most of the common respectable brands appear to use a Realtek chipset. Only the Anker website mentions anything about needing a special driver for macOS up to 10.15 (no mention is made of Big Sur). Seems a lot of adapters need extra drivers for full functionality even on macOS (I personally hate to install extra third party drivers as they always tend to cause problems and break after an OS update).
https://us.anker.com/products/a8341
I too have found most USB-C to Gigabit Ethernet Adapters to have some kind of issue with macOS so I have resorted to using an inconveniently pieced together mess involving an Apple USB-C to Thunderbolt 2 Adapter combined with an Apple Thunderbolt 2 to Gigabit Ethernet Adapter. This has worked well except the Thunderbolt connection tends to pull apart at times. It should tell us something that Apple does not make their own branded USB-C to Gigabit Ethernet Adapter. Perhaps it just isn't possible to have a fully working one under macOS. In fact Apple has even recommended this combination to us for some use cases.
You may want to check with OWC to see what chipset their USB-C to Ethernet Adapter uses as it is not listed on their website.
https://www.owcdigital.com/products/thunderbolt-3-10g-ethernet-adapter
Satechi & Tripplite also do not list the chipsets used.
Plugable lists three versions of their USB-C to Gigabit Ethernet Adapters all using a Realtek chipset as compatible with macOS and they list several other ones and clearly note they do not work with macOS. I know Plugable is a good brand plus they always publish the full technical details on their product pages. I have never tried any of these specific Plugable adapters.
https://plugabletechnologies.myshopify.com/products/usbc-te1000
https://plugabletechnologies.myshopify.com/products/usb3-hub3me
https://plugabletechnologies.myshopify.com/products/usbc-e2500
