So I’ve got a question that could turn into some other advice depending on the answer.
Do you have any smart home controller / hub (other than an Alexa or Google Assistant device), such as SmartThings, Home Assistant, ISY, etc?
Those could be used to programmatically keep track of the brightness internally, and with a couple strategies, could potentially get you closer to your end goal.
(I once did some similar “timed dimming” or “dim cycling until a stop command was sent” via an ISY-integrated Insteon remote)
The path of least resistance may instead be to swap out the original remote and receiver in the ceiling fans’ shrouds/cowls, if they are AC motor fans (as many of the Hampton Bay ones are).
Home Depot sells a “Smart by Bond” retrofit kit which would enable discrete brightness controls (sliders are present in the Bond app, and programmatic and voice assistant integrations should be capable of setting percentage on the lights). Downsides are: a little more involved setup process since it would involve wiring hardware in your home, and the cost of one kit per fan you want to control this way. Might also no longer need the Bond Bridge you currently have if the only RF (and IR) devices you want to control get these retrofit kits installed…
Upside is definitely more discrete control over the fan and light, plus a remote that (mostly) stays in sync with the fans’ states. (Technically it is possible for the physical remote it comes with to get out of sync with which fan speed is active if you use a mix of remote + voice assistants / programmed integrations)