This question has been asked before with absolutely no response, not even a “No Way”. To be honest, it is a bit frustrating.
When setting up LB for a grblHAL controller, I select Grbl and the only connection option is USB/Serial. grblHAL supports an Ethernet connection. I believe Duet3 does too. Other Grbl variants use WiFi so there are a number of capable devices out there. Ethernet and WiFi connections are much more EMI resilient than USB so there is a real benefit to the customer.
I know that other Laser Controllers with Ethernet ARE supported by LB so why not Grbl? The grblHAL connection can be via Telnet or Web Sockets, FWIW.
I was able to use a network virtualizer (Redirect Serial to Telnet - COM Port Redirector) to create a virtual serial to telnet connection. LB was able to talk to the grblHAL board that way. So, it is possible to do. The ap icosts more than LB and is somewhat clumsy to configure. There are a number of other aps that do similar but I wasn’t able to find a free one.
I get this question from my customers on a fairly regular basis so there is some demand.