Check out the CSS for noobs thread (if using the regular dashboard, not the easy dashboard). There is a way to use cas to remove the speeds you don't need/want.
Here is what the CSS I used (you will need to change the Tile# for your specific tiles
#tile-29 div.options.w-full.text-lg div.shadow-md:nth-child(3),
#tile-29 div.options.w-full.text-lg div.shadow-md:nth-child(5),
#tile-29 div.options.w-full.text-lg div.shadow-md:nth-child(7),
{
display: none;
}
This leaves Off, low, Medium, High and on
As a bonus if you want the fan icon to rotate you can add these lines to your CSS
#tile-29 .low { transform-origin: 50% 50%; /* spin around the center / animation: hubitat-spin 10s linear infinite; / 10 seconds per rotation /}
#tile-29 .medium{ transform-origin: 50% 50%; / spin around the center / animation: hubitat-spin 5s linear infinite; / 5 seconds per rotation /}
#tile-29 .high{ transform-origin: 50% 50%; / spin around the center / animation: hubitat-spin 2s linear infinite; / 2 seconds per rotation */}