The plant will need help with humidity until it has a full root system again. Otherwise, it will lose more moisture through evaporation (transpiration) from the leaves, than it can absorb through its compromised root system.
My favorite method for plants that need help with humidity while their roots are getting established is to set the container on a humidity tray, then place a plastic tent over the entire thing. I do not use closed tents, though. I have a little thing that is for adding space to a cabinet. One of these things (without the dishes, of course!
Anything similar would work. The important points are sides that are open enough to allow air movement, and a top that allows plenty of light to reach the plant. A wire basket turned upside down over the plant and its humidity tray would work fine, for instance. You probably already have some item on hand that would suffice.
Then, I drape clear plastic over the rack, so it covers the top and 2 sides. It doesn't have to completely cover the 2 sides, it's okay if the plastic ends an inch or two above the surface the tray is sitting on. That allows enough moisture to be trapped in the air around the plant, but also allows some ventilation, to avoid fungal diseases or rot from setting in.
"Isn't it enough to see that a garden is beautiful without having to believe that there are fairies at the bottom of it too?" - Douglas Adams