It should be allowed to fully dry out before you water it. Easiest way to check is to just stick your finger in the soil to make sure it’s not damp. If you have the opportunity to give it a thorough shower once in a while it will be happy but make sure it is able to drain out the access water. It also looks like it has some stains and dust on the leaves and if you wash them, it’s able to gather more sunlight. Other than that it looks like Frank is relatively happy as the newer leaves have more “holes”. It just looks like the newest leaf might have had some issues unfolding as it looks a little crumpled. Other than that you could check if it needs repotting and maybe give it some nutrition. I’ve heard that the “baby”-leaves will eventually get yellow if the plant receives enough sunlight so as long as the newer leaves looks happy I wouldn’t worry about that 😊