I ended up with Intercoms - 2N
the devices with 2N-OS might be better if you have to troubleshoot something but a flush box installation is not fun (I still want to 3D print an alternative…)
Touch 2.0 is Android which could be more convenient but the slim design of the 2N-OS devices is really decent.
may you reas Best door lock - #13 by Nanna_Agesen - Home Automation - openHAB Community as well.