Lunch

I mostly cook meat in my Eggs, need to try to get myself to branch out and do things like potatoes, etc..  So I don't know how you're going to cook the potato, at what temp, etc..  But I'd guess you're doing the potato indirect, so yeah, my guess is that when the potatoes are done, you'll take them out, lift out the grid, and using a tool made for the job or very heavy gloves, lift out the plate setter and carefully put it down on anything that's not going to be harmed by really hot ceramic touching it.  You could put it on the ground, or maybe on a sheet pan on top of the table.

Then crank up the fire, put back the grid, and cook your steak.

If you're cooking your potatoes at a pretty low heat, and your steak is at least an inch thick, you could put the steak on with the potatoes for the low-and-slow part of a reverse sear, carefully monitoring the temperature.  If it's less than an inch thick, though, I'd just cook it hot and fast, flipping pretty frequently, till it's the temp you want it.

I cook potatoes indirect, then remove the grate, remove the PS woo2/Platesetter, replace the grate and grill the steak.