Yeah, tip one, get the trees off of those stakes....they're too close to the trunk.
Re-site the stakes at the edge of the container and loosely tie off to a branch.

Secondly, the orange looks fine. And it's blooming nicely, too.

Thirdly, am I seeing correctly that the top of the root-ball is exposed?

Fourth, the Meyer is most likely hungry for some nutrients. I would supplement the fertilizer for both trees.

Lastly, if the potting mix holds too much moisture (hard to imagine in zone 10), that could lead to yellowing leaves. Just to keep in mind.

Josh

What greenman said. Also, Vigoro fertilizer is a good fertilizer for citrus grown in the ground but it does not work well in container soil.

I would switch to Osmocote Plus slow release, and add a liquid fertilizer once or twice a month, such as Dynagro Foliage Pro or even Miracle Grow at half strength.

Thank you greenman and Barb.

The orange tree leaves appear the be cupped and hasn't changed at all in over a year. I'm assuming this is normal and hopefully will fruit now that it's in a bigger pot. I'm not sure if that's the root ball that's exposed but I'll try adding more planting mix.

I had no idea that Vigoro was good for ground but poor for container plants. I'll look into Osmocote.

I've had good luck with Dr Earth fertilizer for my citrus in pots. Presumably you already know citrus are heavy feeders?