Intonation adjustments are not that difficult to do, but can be time-consuming. Saying that the fret board has been installed correctly and the strings are decent, the three items which affect intonation are correct bridge placement, nut slot height and saddle height. It's the same with all ukes, price immaterial. It's all part of a decent set-up.
Intonation perfection depends a lot on the player, If one never plays down in the ninth-or higher fret range, then it may be no big deal if the twelfth fret is a few (or more) hertz off of being a perfect octave higher than zero fret. Obtaining intonatiin perfection may not worth th effort.
If the saddle is in the wrong spot, the scale is off and the fret distances will not be correct for the scale. Verifying scale length (distance from center-of-nut-slot to center-of-saddle) should be the first step. Also, the distance from center-of-nut-slot to the twelfth fret should be exactly half of the scale length. Removing and reinstalling a uke bridge should be left to a qualified tech and most won't want to do it. It's often better just to return the uke to the seller as defective than try to mess around with bridge removal.
Once the nut slot heights are adjusted so strings are at the best height for playing comfort, the intonation needs to be checked. This is because very small changes occur in string scale length (distance between center-of-nut-slot and center of saddle). A string length adjustment (a very small one) to make up for adjusting the nut slot height) can be done by raising or lowering the saddle height.
Lowering the saddle height often requires removing the saddle, uniformly sanding its base a very litte bit, reinstalling the saddle, tightening the strings and checking tone. This may need to be done several timesand requires patience.
Raising the saddle often requires removing the saddle, placing a very thin shim (e.g., strips of paper or business card work well) in the saddle slot, reinstalling the saddle, tightening the strings and checking tone. Again, this may take several attempts before on is satisfie with the result.
I haven't yet had a uke, guitar, banjo, banjo-uke or mandolin which didn't require some set-up work, price immaterial.