Q. This question may seem zany, but I always wondered if G-d creates the world every day as we say in davening; hamechadesh bechol yom tomid maaseh bereshis, why is it then that we don’t say every day the bracha of shecheyanu?
A. Actually we do say something remarkably similar to the common Shechecheyanu, at least twice a day at the modim derabanan, when repeating aloud the amida;” brachos vehodaos… al shechechyisanu Vekiyamtanu,” which is basically that same blessing. Besides there are numerous other brachos and tefilos thanking Hashem for all miracles and gifts created, such as the bracha of yotzer hameoros you quoted.
Rabbi A. Bartfeld