Years ago I looked into trying to flash a similar set of lights from Aussie KMart which were running an ESP (back in the Tuya-Convert days) but since I couldn’t figure out a suitable ESPhome config for them the project went stale. I’ll have to have another crack at it with what you have here. My main concern was with trying to get decent effects similar to the standard ones out of the box. The main difference I se with the ones I have is that they have multiple colours effects.
They are like the ones in this Christmas tree set.