How can I setup a bridge from Wifi to a local Ethernet using a Raspberry Pi and a basic Ethernet switch?

I would like to setup an Ethernet switch in the garage which will provide connections to the same LAN segment as the main building. However, there is no network cable between the main building and the garage, but there is WiFi coverage in the garage. I have already accomplished what I want with a TP-Link Archer A7 router which supports wireless bridge mode. However I would really like to do it with a simple Raspberry Pi and a basic ethernet switch instead. By using GRE TAP interfaces/tunnel, I was almost able to succeed, but it struggles with long packets (because of some annoying MTU issue), so many packets are lost. I have also found some ways online to solve this using NAT, but this is not acceptable in my use-case. The devices connecting to the switch need to be on the same LAN segment as all other devices in the main building. Can somebody provide an answer of the best way to accomplish this?