To enable HomeKit control for your Shelly devices, you can utilize the Matter bridge plugin, which extends compatibility across Shelly’s Gen1, Gen2, and Gen3 product lines.
Link to the plugin: https://www.npmjs.com/package/matterbridge-shelly
The following GEN 3 devices are certified after 1.6.0 firmware version : Shelly 1 Gen 3, Shelly 1PM Gen 3, Shelly 2PM Gen 3,Shelly Mini 1 Gen 3, Shelly Mini 1PM Gen 3 , Shelly 1L Gen 3, Shelly 2L Gen3, Shelly Plug S MTR Gen3
All GEN4 devices are Matter certified too.