@Emil Neat! I am seeing that setting MoveToLevel with OptionsOverride set to 1 does set the brightness when the light is off when it is turned back on via Matter, such as in the Apple Home app (which is something I've never been able to do via any exposed app controls). But, oddly Tapo itself seems to not honor that setting if I turn the light back on via the Tapo app, or more importantly via the wall switch. Seems like a Tapo quirk/bug and not an issue with FlicScript since it seems the setting is properly honored within the Matter protocol.
From poking around more, I found the OnLevel attribute which looked interesting and I was able to set that with matterModule.writeAttribute(thisMatterDeviceID, 1, 'Level Control', 'OnLevel', brightnessLevel, () => {}). This appears to basically do what I want when the light is off, it will always get turned on to the specified brightness level. This has the effect of not keeping a manually set brightness, after the light is turned off and back on it will turn on to the specified OnLevel brightness instead of the previously manually set brightness, but I think that is actually totally fine for my desires in this project.
This is so much fun to be able to work with Matter devices at such a low level! I really appreciate your advice and help with this all!
