My Kamaka soprano and 2002 KoAloha tenor came with one side dot (on the seventh fret). Pretty sure that all the newer KoAlohas come with side dots. My Flea had none.
I'm so used to the fretboard on the Kamaka that I don't really need the dots. But I added some yellow side dots to the Flea with little drops of acrylic paint, and the KoAloha has designer-colored stickers now.
Kanile'a and Kalas have them on mine. Ohana and Mainland don't. I have applied stickers for them. The Amy #2 that Bradford Donaldson made also has them. The Kanile'a side markers are inlayed abalone... very nice!
Even the Makala Dolpin bridge uke has them!
I really appreciate side markers. Especially when I switch to a different size uke, or when learning a new song. Very important for me.
My Mainland Honeybee Soprano has them but my Mainland Slotted Head Concert does not. That's bc the Honeybees came form a different factory. Still an amazing uke though!!
It's no big deal to add them. Common sizes in mother of pearl or abalone shell are 2, 3, and 4 mm for side dots. You can get them from Luthier's Mercantile or Rescue Pearl. Luthier's also sells brad point drill bits in those metric sizes. If you're not used to doing this kind of thing, have a local luthier do it.
I never use side dots (that isn't b/c I'm good) b/c my dad taught me to feel my instrument(ok it was a guitar). I realized that my meles didn't and my koalohas do about a month and a half ago. I never noticed before then.