Be patient :-) It's still very early in the season and none of mine are making much of a showing yet either. Give it a few weeks.

IME, it takes something akin to a nuclear blast to kill a hosta. No worries about dividing or transplanting.

Re: "it takes something akin to a nuclear blast to kill a hosta''
or a mountain beaver........

....Or slugs.
They LOVE Hostas.
Mike

Slugs may munch on 'em but they won't kill 'em! And some hostas are not considered by slugs to be very tasty. The rougher, more wrinkled the hosta foliage, the less likely they are going to be high on the slugs' menu.

Here is a link that might be useful: slug resistant hosta varieties

I'm in a cooler zone, and my hostas are just now poking up through the mulch. Though it has been a mild winter, some plants are smarter than those of us skipping around, tootling that it's SPRING!

It's possible that if hostas are planted too deeply, they would emerge slowly in the spring. In my experience, they also in general are more vigorous and grow faster if they are planted a little bit high. The ones that do well for me have an inch or so of root visible at the soil surface around the eyes. I cover it with compost mulch, but they are that shallow.

If they are planted too deeply, they can decline and even disappear over time.

The good news is that if you think this is what happened, you can just dig them up now and replant them higher, and they will be fine. They are very tough and tolerant.