Yes, that's the one for the lathe.
They also have one for the mill,
which is very similar.
It costs 200 USD plus shipping and communicates with LinuxCNC over RS485.
I wrote a HAL client driver for it, which I just open sourced:
github.com/LiNC-CNC/cnc-panel-rust
This repo also has a python HAL driver.

Do you use this control panel? If so, could you please let me know how much it costs and how it communicates with LinuxCNC?

www.szghtech.com/SZGH-CNC-control-system-1080TC

I need two ports so that I can dedicate one to EtherCAT and the other to Ethernet Mesa. 

Anyway, here is a photo of the M.2 network card from AliExpress that I tried using.
Right after I installed it, the PC froze on the very first reboot.
After that, I managed to successfully configure the card for EtherCAT and even saw the slave devices. I was thrilled and decided to connect the Mesa card to the built-in onboard network port to test them running together. As soon as I plugged it in, the computer suddenly rebooted. 

Following that, the M.2 card disappeared from the system completely. I double-checked the physical connection, and it showed up again, but the glitches kept happening. In the end, I just pulled it out and threw it into a drawer. 

In theory, there is another option: installing a network card into the NVMe M.2 slot instead of the Wi-Fi slot. The power delivery there should theoretically be better than on the Key-E Wi-Fi slot, but I am really not sure about that approach since it would require buying either an adapter or a completely new card, and the end result would still be highly questionable.

Hello I am very new to everything so I don't know much

I have downloaded the rpi image from download page and installed it with Raspberry Pi Image app and I found my latency and histogram very bad.
I had installed linuxcnc a long while ago with the same stuff it was bookworm then so I was very worried and though I might just go back to that image but I notice something on histogram it said no_isolcpus. which I remember that I read that core 2,3 should be isolated so I googled how and isolated them and the latency became much better.

I took a screen shot of the histogram but it was saved in tmp /media/kunena/emoticons/

If you just need to add an ethernet port for general networking and internet, just use an inexpensive USB dongle. (Not sure about options for a 2nd real time capable ethernet port.)

I've received the DA-3605 module (4 channels, +/-10V). Couldn't pass it up — it was brand new, sealed, and cost me only $23. Now, to complete the setup, I just need to find the encoder modules. While I'm looking for them, I want to try running a combined Mesa + EtherCAT setup. 

I tested an Intel i226-based network card from AliExpress on my Lenovo M710q, installed in place of the Wi-Fi module. Unfortunately, the connection was unstable, so I think I need to look for a different solution. 

Does anyone know of a proven, ready-to-go solution for adding a second network port to a Lenovo M710q?

Unfortunately, I only have one. The supplier has sent me another EtherCAT board for the MH300 to see if that is the source of the problem.
Delta has indicated that this is a bug; on other CNC systems, they use a flag to disable the Product ID check, which avoids this issue. Is there a way to do this in our XML file?

I have added some more functionality to the grid script it can now cut gridlines drill holes and make counterbores.
 

Script attached