White fan switch not changing fan speed

I have installed 2 white fan switches using android / smart things.

There was no issue with setting up the switches / pairing.

Both are installed with neutrals to ac fans that have switches for the fans separated from the switches to the lights.

Both switches replaced enbrighten fan switches that worked without issue.

The problem is that when I change the fan to low medium and high, there is no difference in fan speed. If there is, it’s so minimal that I think I am making the difference up because I’m wanting there to be one. I tried with the fan on all 3 manual settings using the pull string but no speeds seem to change. The switch is set to 3 speed fan single.

The enbrighten switches changed the fan speeds with no issue.

Am I missing something?

Are there local setting for the speed each setting really means?

There is a dimmer slider under the fan speed but it seems that the percentages only correlate to the 3 fan speeds.(That don’t actually change the speed of the fan)

Any help is super appreciated! I didn’t see anyone with this issue in the knowledgebase.