You do mean LRCC, the new cloud-dependent program that starts up with a leaf on its splash screen? If so, there aren't any options other than those you can see. Its export choices are very limited, and as you've found you cannot see the DPI (just export the biggest JPEG you can), so except in very simple situations it's just not suitable for supplying images to clients.
If you are working with clients, are you sure you want to be working with the new Lightroom CC as opposed to Lightroom Classic CC? The NEW Lightroom CC isn't really geared towards professional photographers right now. It might be some day, but it's pretty limited in my opinion.
You may not be able to specify the DPI exporting from the new Cloud Based Lightroom CC but, if the Original Resolution is in the Cloud and it’s from a dSLR I’d imagine it’s good enough quality for priinting......
the Photo in the Cloud is a Smart Preview synced from a Lr Classic Collection, in which case it would probably wouldn’t be.
Yes, that's why I said "just export the biggest JPEG you can".
Still, LRCC just isn't suitable for this kind of workflow. As Jim says, "If you are working with clients, are you sure you want to be working with the new Lightroom CC as opposed to Lightroom Classic CC?"