I doubt Walmart has any policy the pharmacist is breaking.

However, some pharmacies do. For example, Walgreens in 2018 specifically prohibited pharmacists from choosing not to fill prescriptions:

[She] was determined to do whatever she could to help other women from feeling as judged as she did. She filed a complaint through the American Civil Liberties Union alleging sex discrimination, and Walgreens ultimately agreed to a company-wide policy so customers would get prescriptions in a timely matter, even if pharmacists had personal objections to the medication.

Anyway, pretending off-label prescriptions have never existed is going to backfire on the media, if the unemployed nurses and doctors can pry themselves off chinese dance apps for two minutes.

My wife stated that he did not have the right to stand between our physician's prescription and the patent, he asserted that he did have that right and he refused to do so,

The Somali-stomper is wrong here. The pharmacist can be held liable for interactions they are aware of, and has a duty to intercept any prescriptions that look wrong. It's just that off-label use of ivermectin is proven by studies and practice all over the world, so this is a political ploy. But it's not as simple as a vending machine, even though it should be.

raise money to file a federal lawsuit against the pharmacist and Walmart

It's a grift. There is a lawsuit in here somewhere, but I bet this will be rightly thrown out.