I don’t see an option to center conditional formatting icons for a table. How can I do this properly?
It is not possible to change the placement of icons via conditional formatting. However, if you do not want to show the actual value but just the icon, you can achieve what you want by adding a calculated field that sets the value using the same condition you are currently using in your conditional formatting, as follows:
ifelse( condition=1, '✅', '❌')
(Unfortunately there does not seem to be a green check mark 
but you could use this and change it’s text color (either using format visual or using conditional formatting))
and then formatting the visual and changing the Cells alignment to be centered:
@darcoli , the above solution is not working with value fields, calculated field is created but in the visual it’s giving the count by default. Can you please let me know if I’m following it right?