is it possible to make a button visible in one tenant but not in the other?

What I do is add a boolean field to the related setup table like SOSetup that toggles the functionality on/off. Add that field to the setup screen and then, by tenant, you can toggle the visibility of your button on and off.

You can also hide the button using the Access Rights. 

you can also use this by company validation

protected void _(Events.RowSelected<YourDAC> e)

{

if (e.Row == null) return;

// Example: check company/tenant

if (PXAccess.GetCompanyName() == "TenantA")

{

YourAction.SetVisible(true);

}

else

{

YourAction.SetVisible(false);

}

}

or 
 

Create a setup flag like:

EnableButton = true/false

Control visibility based on that