It should be just fine. Here's my test with an early build. There are many other user tests in that page. Be sure to read the top of that thread for full information about what this does; it also contains the list of devices known NOT to work. (I was disappointed to see the Mikrotik hEX on that list, it's an otherwise nice cost-effective device that's easy to get in Europe, but they appear to have made a factory change that cripples it for this purpose.)
If you find what you're sure is a supported model in a combined wifi/wired router, obviously you can just leave the wifi turned off if you don't need it. Just remember to turn on "Hardware Flow Offloading" under Firewall/General Settings, where you set up masquerading and NAT for your WAN interface.