sorry, but this will not be done, as the possible permutations are endless and make any sensible formatting that takes account of all of those permutations nigh on impossible
it actually also says so in the help screen of the admin opening times page under the “closed” tab
and in the docs https://docs.wp-pizza.com/shortcodes/?section=openingtimes
though I agree that it might be helpful to display this info in a few more places perhaps somewhere