Matter-over-Thread devices are natively supported on both Homey Pro (Early 2023) and Homey Pro mini. These devices don’t require a dedicated app to be added. The available features depend on what the lock itself supports via Matter.
I know there are plans to add it to the Kwikset app for Homey as well, but this will only include a custom icon and pairing instructions. The functionality itself will remain the same 
Thanks Doekse for a quick reply and the useful information.
Update: I received the Kwikset Halo Select Model 9800 with the Matter over Thread capability. Connecting via Matter was easy. However, the functionality using Matter is so limited that it makes the lock next to useless for a smart home. The ONLY capability using Matter is remote lock/unlock. The user cannot setup and control access codes. The lock keypad does nothing. You cannot grant access (via access code) to the kids or service people. It does appears the Apple Home Kit Matter interface does enable access code support. So, I would not recommend this lock at this time with Homey and I would recommend that Kwikset at least provides the capabilities that are offered in the Apple Home Kit implementation when they update the official Homey Kwikset app.
I bought the Kwikset Homeconnect 918 and unfortunately find out that its one of the only one that isnt supported natively by the app. Hopefully it gets intergrated in the future
I sent my Kwikset lock back and got an Aqara U100. Works great and I’m very satisfied so far. It is connected to Homey via an Aqara hub.
