Hi @Presto25,

For long-distance communication, we recommend you set a point-to-point connection.
Which means you will need two CPEs plus one AP or wireless router and a clear line of sight.

The connection should be like Router----AP CPE)))(((Client CPE----Another AP.

One CPE should connect to the router in the main house to extend wireless signal to the other building, while the other CPE should be installed in the other building(your shop) to receive the signal from the 1st CPE.
The 2nd CPE will work under client mode which means transferring the wireless signal to the wired signal, so it will not broadcast a wireless signal.
If you need a wireless signal in the other building, you need to connect another AP or wireless router after the 2nd CPE to broadcast Wi-Fi.

For more details about this application, you can refer to the link.
We have some articles and instructions that might be helpful:
Long-distance wireless connection concerns when using outdoor access point
How can I set up the AP + Client topology successfully