Trigger rescan for Insteon devices

[newb1]

Some time ago, I replaced my home automation server hardware with a small single board PC and installed HomeAssistant(HA).
After moving the setup, all went well for quite a while, until recently when one of the 2-way switch units went U/S.
Now, after many of the details of the setup - and associated notes - have disappeared & gone awol, I need to replace some of the switchLincs.

As part of that process, I have been wondering whether there might be a way to trigger a complete rescan of the Insteon network.
I have found a couple of comments which seem to say that this was possible at that time, but it would seem that the GUI of version of HA used or current at the time the comment was written has changed enough to no longer correspond to what the comment described, compared to what I see right now with Frontend 20241106.2 - updated earlier today.

Customize.yaml troble

insteon first run found light.lamplinc_dimmer and put this in customize.yaml light.lamplinc_dimmer_3a_5f_27: [] but trying to add my motion sensor i messed something up now it shows as error when check config… expected a dictionary for dictionary value @ data[‘customize’][‘light.lamplinc_dimmer_3a_5f_27’] so what would be correct santax ?? and is there a way to get insteon to rerun the discovery as it did when first started thanks frank

My question is: Is there a way to get a rescan, and how would I go about triggering it?

FWIW, I am accessing HA via its web interface at localhost:8123
TIA,