Walmart? Yes and no. The employee policy is clear. No discrimination or disrespect of any kind for any associate or customer. All acceptable clothing choices, including skirts, can be worn by anyone regardless of gender, the only difference being that people identifying as male have to tuck in their shirt (not often enforced). Bathroom use is generally under the respect rule. In my store the transgender associates, all three and a half of us I'm aware of, use the restroom we feel appropriate with the support of personnel. There was some push back from other associates when I opened that particular can of worms but personnel made it quite clear to them we were acting appropriately and there have been no issues. Some group, I forget exactly who, rates companies. Walmart got a 90, missing transgender accepting health coverage because most associates aren't eligible for health coverage. I have no idea if the plan gives transgender services to the people who are eligible. I'll have to ask my friend. She's a manager and one of us.
Despite all of that Walmart has made no public statement either way, probably because they're based in Arkansas and saturated in the regions most up in arms. I'd love for them to say something, but quiet acceptance is all we can really ask when the majority of us don't feel comfortable being activists either.